Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5de2323dde6f2da…

MALICIOUS

PDF

86.1 KB Created: 2021-07-27 18:37:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1aaef37092d1b40e882914303b559edd SHA-1: b838c31550dd9c7d8c9d6e0d38caa220074eae88 SHA-256: e5de2323dde6f2da1e3abbbe913de36773cdd075a96d6aee2d4d631b9f2bc718
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. Heuristics identified it as a brand-impersonation credential phishing lure, specifically impersonating Apple, and also noted a callback phishing lure. Multiple embedded URLs point to potentially compromised or disposable hosting, suggesting an attempt to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=can+you+change+your+phone+number+online+metropcs.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://speckrepeg.by/UserFiles/files/73769453263.pdf In PDF document text
    • http://a-mega.ua/images/uploads/file/pekenumikeb.pdfIn PDF document text
    • https://path.mn/userfiles/files/dogabovigi.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/0c2526cd22859ca46688413f3d08c4c0/tibobemolizido.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/3dfb71590fd6424a16b3fe409bbe9cc2/sudiwa.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/suxoloni.pdfIn PDF document text
    • http://orrizon.ru/images/file/naginawowizamavisuvif.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/86887196140.pdfIn PDF document text
    • http://spiregene.com/image/files/20210705_125716.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/47ae7a5985d81a5dc51785c7281a7143/jinerev.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/34318974722.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/52425daac96269be791b98b4900fc90f/54267867698.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/54e73ce06aaa7a35a0a7f170cc03dde7/tugulusevamuxunudag.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/68616528386.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/23461437cf1d4f76adb198d0aabedaf8/95336954501.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/kdnpbdjdqnq99iejosj6ihfpm6/pabofijuwilajumuju.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/zekekukivosabeta.pdfIn PDF document text
    • http://taskentcompany.com/userfiles/file/69428938081.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/ef86298f6a7e590f492d31cf3e28096e/metulom.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/77db4df328c626945c7276cadc6115ea/28142427988.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/75790394655.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/9uann3vousdbclubpppo2ft220/36129162783.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/751t463jnl9urgqcdvalcvtoc0/21100618531.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075a04713f8f---63919595777.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c023738ba63---98823329427.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=can+you+change+your+phone+number+online+metropcsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBD 11208 bytes
SHA-256: 8081dbe186db67cd2db27b489bbf67b94f14f5691197fc121dfab2724e591070
font_01_sfnt_off00010795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10795 16444 bytes
SHA-256: 0bd101c5d535ae8a134986e5f7a76708fffa067c366a1a309d8ae2d3f682e162
font_02_sfnt_off00013261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13261 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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