Malicious PDF — malware analysis report

Static analysis result for SHA-256 5befe3e30d253a97…

MALICIOUS

PDF

84.3 KB Created: 2021-09-02 21:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ab95e9a09d9d91e32f53ddb13c0d7f10 SHA-1: fd72b983108f3bce6bc93a5525ef6c7c5f9d77a2 SHA-256: 5befe3e30d253a97830113e1a601c6684a585864f2dab3496b303e2af0e5b2ba
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or scam lure. The embedded JavaScript and numerous external URLs, many hosted on compromised or disposable domains, suggest an attempt to redirect the user to malicious content or facilitate further exploitation. The 'SE_CALLBACK_LURE' heuristic specifically indicates the document prompts the user to call a phone number, a common tactic in tech-support scams and callback phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://infrive.ru/uplcv?utm_term=latitude+7290+service+manual PDF link annotation
    • http://vietnam-intraco.com/webroot/img/files/todedovosar.pdfIn PDF document text
    • https://cahayaapi1.com/contents//files/24037960198.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160b0dc9681669---foligaruzuwapozewa.pdfIn PDF document text
    • http://goldia.cz/data/file/bimezoxezoso.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/75598630231.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/22100334321.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f6e9bb1d1---22953942952.pdfIn PDF document text
    • http://sakem.org/userfiles/files/7545661846.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d75b5ef7d7---5531234631.pdfIn PDF document text
    • https://mariapolis.es/ckfinder/userfiles/files/mudevixididumuviroxuvije.pdfIn PDF document text
    • https://tahubunting1.com/contents//files/datexapepalunawojukepudub.pdfIn PDF document text
    • https://www.alitec.es/js/ckfinder/userfiles/files/73736166059.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113eddae30dc---veditarijububedepuvexe.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/22746992611.pdfIn PDF document text
    • http://assistance.uz/images/shared/file/rifajukek.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/596e46923c315fa513e29ee2fef1f204/kitix.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a059559522f---40864829618.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/sefugon.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/xexapafakerawejibudun.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/ff6dc7ef583c7384739b805c9ead8971/46848576853.pdfIn PDF document text
    • https://alternatifhirdavat.com/upload/ckfinder/files/57414676849.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/07a56b7940ccd5e46f137c81acff462c/19454957423.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/68783380597.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/5f75f37424b52b766833c6769ebd2e39/mozexigizuwupaxul.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160776a6a0495c---tenuwerolawabowegarezuni.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_off0000eba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B8 10996 bytes
SHA-256: 23817316b4aec29e2ffb540cedb6f86e189a0124f41222b82286578c523a290d
font_02_sfnt_off00011d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D5E 15300 bytes
SHA-256: 7195f49ba53f95fc8f16b6b5dd1612024818600b8621edea0ac5c281bf30391e

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