Malicious PDF — malware analysis report

Static analysis result for SHA-256 62e2b7c7912736b5…

MALICIOUS

PDF

77.0 KB Created: 2021-09-01 21:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b6d134a79546d1ad71aa19afb6538587 SHA-1: c7a1ad88d653b901b2a6f1cda4f22315e632927a SHA-256: 62e2b7c7912736b52adce0dfd1fffa7f3daf147d2db03087b5e6b88cb468d1ea
176 Risk Score

Malware Insights

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

This PDF document is flagged as malicious by ClamAV and an ML classifier, exhibiting characteristics of a callback phishing lure. The document likely exploits a PDF vulnerability to execute code, potentially leading to the download of additional payloads from the numerous embedded URLs. The presence of multiple links to compromised CMS upload storage and disposable hosting suggests an attempt to obscure the final destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://pistant.ru/uplcv?utm_term=ph+level+of+fruits+chart PDF link annotation
    • http://popeyebio.com/upload/files/94619171167.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16077a51b857c7---pekogopiwiso.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/xixaxerajituvexamujaxaw.pdfIn PDF document text
    • http://serbanindustrialconstruct.ro/uploads/files/8692725578.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/73d909be5ab8ba488ce7217672c3e0b4/bilogofepifofediviwalut.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/26621410110.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/52362331166.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/58505695346.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/malojowiw.pdfIn PDF document text
    • http://ibarugi.com/fckeditor/userfiles/file/pigonijimo.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210725_478916C0560D8D14.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d092ca2303f---87553898754.pdfIn PDF document text
    • http://qdsenfeng.com/data/files/tumimexefotiratole.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/pekatobew.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/jufodikuvitiliv.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608bca74a1595---monufomezabiwubufusugabix.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/6448023650.pdfIn PDF document text
    • https://www.hmgfinance.com/ckfinder/userfiles/files/jasidez.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/101b636ac68d96ce88b16816f163413b/valobusefojo.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/gixogowamotetadulivux.pdfIn PDF document text
    • https://navoloki.mebel18.com/uploads/files/fagosezerepa.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/bepetajeziro.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c34eabebee7---88991776375.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/pegijurezekexixafugi.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/d07d02edb26a00951c1a902f9b9836a9/48242462983.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/47056647196.pdfIn PDF document text
    • 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_off0000c8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FC 10496 bytes
SHA-256: 7a6d3c3a50ca426aae4beb826e85d26296491bd51a53b8eedaa6eb456bc665d6
font_01_sfnt_off0000e111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE111 17596 bytes
SHA-256: d23bdaa7ce6ed8c4c15480b309a4868a056b0c51ebaf0f2a15d00e86eed2a534
font_02_sfnt_off00010df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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