Malicious PDF — malware analysis report

Static analysis result for SHA-256 701def8068beb632…

MALICIOUS

PDF

73.8 KB Created: 2021-09-09 02:32:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e9bd334bb4bb7adb62ef4ce6f1e6c54f SHA-1: cda10c3266bb48d9f09e350d1e191f67ca64e0b2 SHA-256: 701def8068beb632c24d951513c3fe0015488032d392d6b18a6c270ff192738a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs pointing to compromised websites and disposable hosting, likely serving as a lure for users to download further malicious content or engage in a callback scam. The 'SE_CALLBACK_LURE' heuristic specifically suggests the document is designed to prompt users to call a phone number in a deceptive context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://synerhu.ru/uplcv?utm_term=smart+security+phone+cleaner+booster+defender+download PDF link annotation
    • http://nachhilfeschule.havonix.com/ckfinder/userfiles/files/turatulukukewivefosax.pdfIn PDF document text
    • http://hanmih.com/userfiles/file/20210904140615.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/dlpnsgmrm90lb3a8orbskq862h/joluxoje.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/161354da4486a6---17896952075.pdfIn PDF document text
    • http://clinicaveterinariaalbese.eu/userfiles/files/wusikin.pdfIn PDF document text
    • https://vieclamlaocai.vn/webroot/img/files/nadikifesajiver.pdfIn PDF document text
    • http://k12kos.com/ckfinder/userfiles/files/20584491027.pdfIn PDF document text
    • http://mtreurope.com/ckfinder/userfiles/files/58156667223.pdfIn PDF document text
    • http://pandoraecza.com/genelresimler/file/bipamokudiku.pdfIn PDF document text
    • https://wotfiles.com/ckfinder/userfiles/files/66188726904.pdfIn PDF document text
    • http://slesnick.net/userfiles/files/pesutu.pdfIn PDF document text
    • https://jingchengs.com/jingchengs/ckfinder/files/20210905163450.pdfIn PDF document text
    • https://signatureshreyas.in/userfiles/file/34443304295.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/161306cfbdb75e---peduvumow.pdfIn PDF document text
    • http://sunpix.ru/img/lib/file/babugaporup.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/mutebipekaxez.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/rejabuladire.pdfIn PDF document text
    • https://wronba.pl/uploads/wysiwyg/file/17456812139.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/zakuredizu.pdfIn PDF document text
    • https://maxflowfans.com/userfiles/file/73426049435.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/54642464078.pdfIn PDF document text
    • http://kbchina.de/upload/tujozup.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/23211304619.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/d69e820400c2d3fbbb06516b3c75142b/bosolugiwikowadi.pdfIn PDF document text
    • http://camelliafb.com/uploads/files/202109062355306368.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_off0000b93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB93C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d14e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD14E 17368 bytes
SHA-256: 4126d6a5240a727b32fb87c9b1bba65e957545075e578825f7fd30d715796fed
font_02_sfnt_off0000fe74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE74 11400 bytes
SHA-256: 482c76f86664be49dfbb32a5564f88a417fe182be0442c31e0d1561f8dac830e

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