Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf9ec01f6c62f05…

MALICIOUS

PDF

82.3 KB Created: 2021-06-26 07:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8d22a66fbeef6151f8dfcf0875e256f8 SHA-1: 417cbf593b983de5c4f1dbebdf3ba5ef38c4c497 SHA-256: eaf9ec01f6c62f0563c07aac5b36eaa449b573817d56120f52dbd4d1a1bddd06
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm and a callback phishing lure, prompting users to call a number for fake issues. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious sites or initiate fraudulent phone calls.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160700d83714cd---31371778034.pdf
    • http://lineshare.net/upload/files/20210618164944.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16092fc8ae0f7c---dezawulod.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160879f4657353---94458170883.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16077c08f36bd0---guwupiposebebaxefa.pdf
    • https://accuratesearch.com/userfiles/file/nabilupurakepufiz.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be598bb402e---doredunumoxaz.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16078b8ea5f7c3---dodaxubofepijobus.pdf
    • https://autotrans911.com/thread/admin/uploads/file/99668412979.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4feda64536---94169734721.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608579d91c8ea---finuxuvek.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/ium49k8onapo2fsac4v36qahm5/futekaruwuxetofobujesobi.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/63be6fefba585ffb57349a5ee9b18456/39611464326.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bedc29306c3---paxikuwotaratemojiz.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/glt0dtch3odompt4v7bag5qmg0/nodifaguzoxere.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/9097036b3624d61a6fa5881489e577f5/51176334185.pdf
    • https://dubaimotorcycletours.com/uploaded_images/files/gagirexozetebuvuxipakuwuw.pdf
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b15b0595922---91900322853.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/26d28bd3d36353320ed75d522f0ad7ec/geleviwotabese.pdf
    • https://planet-for-events.de/userfiles/file/92213750240.pdf
    • https://actor-conseil.com/files/file/nefidazi.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608385f668701---39861626256.pdf
    • http://ongnuocdenhat.com/upload/files/bazebimujoni.pdf
    • https://n-zvuk.ru/upload/file/63570721151.pdf
    • http://oreade-breche.fr/userfiles/file/gasatewanos.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=never+forget+you+by+zara+larsson+mp3+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2b2.bin
e2cbc342b2cd41e8f75c984262ec561d4d7460c1cf9e343e344efa2fb2a21aac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2B2 18552 bytes
font_01_sfnt_off0000f273.bin
4b4cabace0296b6421708ca4cf03bd8747b56cbff8808de87f6caa8d04f37856		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF273 11464 bytes
font_02_sfnt_off00010d57.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D57 16792 bytes
font_03_sfnt_off00012568.bin
fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12568 16144 bytes

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