Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3ee17118896d8a6…

MALICIOUS

PDF

88.0 KB Created: 2021-08-09 07:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2d569728b8b8f0679d6603d57dbc45a4 SHA-1: 3ac684e3f8b4d92fe82c84ec8fa22bc68e0abf1b SHA-256: e3ee17118896d8a62016186deb877a0b9a3d570209e670a7621fe86c1c5d4564
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. The 'SE_CALLBACK_LURE' heuristic suggests the document is designed to trick the user into calling a phone number, a common tactic in phishing and tech support scams. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing attempt, likely using a link farm to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://permagnet.com/upload_files/file/210730014439556781gwkwnc.pdf In PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/26a5cd3e18edac5c26ab98262e10931a/feresep.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/nidawogiworamavikujizuxu.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/db038d007aac20ce59aac9049278834a/56485140231.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/gizepejavu.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ac575c3d416---dofaxikiguzaxapokigetaw.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/8ee12a10d4909880255e428ca39d959d/vunawikawidegozuk.pdfIn PDF document text
    • https://mangmalungtea.com/userfiles/file/85008945783.pdfIn PDF document text
    • https://pagodatalk.com/_UploadFile/Images/file/19977779091.pdfIn PDF document text
    • http://e-district.org/userfiles/file/nofasagizajog.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/37147986006.pdfIn PDF document text
    • http://agriturismoilnoceto.com/userfiles/files/denonumutedow.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/1531127546.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/dabcea8434f0789bac5d6b22efee7d8f/tixolud.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/bipekow.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba6ac8891c1---tirisujapokokajilidigu.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/3bf5c662a033750bec7596aa838999ed/guzuterubaxek.pdfIn PDF document text
    • http://c-amc.com/upload/files/durokejo.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/614c0f35c80efb4dcc0731e4e0e172d7/vojobotis.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16102b1a172ffb---30093474542.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/a5b404ebeca44a7c1d7ff993e2af51bb/kibajemodudasevu.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/19074569550.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=logo+design+templates+psd+free+downloadPDF 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_off0000f327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF327 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B39 17792 bytes
SHA-256: 608bdfebedbbb95c9769b070d369795eae98f6838e2a842bbbc480eef0b8858d
font_02_sfnt_off00013941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13941 10884 bytes
SHA-256: 56330dabe0fe8df9245548310eec99434acf9f50303f6e0546df12c623ab0386

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