Malicious PDF — malware analysis report

Static analysis result for SHA-256 61afcf8fcc05f67a…

MALICIOUS

PDF

115.8 KB Created: 2021-06-26 23:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eccce7e84a2c17c6c50743a361220096 SHA-1: bc542b8a01605990facf422e3309826e5eef6f14 SHA-256: 61afcf8fcc05f67a9311cf70c23334c9a1a0f5bb5e6de4e87d7994f7b8b3a34b
196 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, and exhibits characteristics of an advance-fee scam. It contains numerous links to external PDFs hosted on compromised WordPress upload directories and disposable hosting, suggesting a lure to download further malicious content. The document's structure and content align with phishing and advance-fee fraud tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • 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://diysmart.net/userfiles/file/zetudikagovidaxugiku.pdf
    • https://angkortaxiservice.com/userfiles/file/74982592681.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160740911296cb---silakosozakovaporuw.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e055928d4b---92036215499.pdf
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f4c786d3b---17822615064.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/4ced879fc77573743940cd181a22d244/40466616550.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/of7mnp6rmu80hjp40itguo9n9d/vinejofapizovikumi.pdf
    • http://mertlakustika.cz/images/pages/file/pojazam.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf955ec1ebc---pizoragoxafudud.pdf
    • http://brixtontaxi.com/survey/userfiles/files/rageligotabe.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba212a77124---65544214723.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8e78bddf2---11334955195.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cf753a382---ruwasugezekunawi.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/27528e0ded36d77cdd405c170145a094/tosixojimelozuroparotom.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/ofmb3frluqgdomd7166udetm38/68978592811.pdf
    • https://barcelonacentremedic.cat/files/galeria/files/58152764926.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d8361218b---53749728747.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c424fb61914---42607507506.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/bhhoh0q1fslckk1hffieu8s931/3931632740.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160aa99be19b64---49698058776.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=injustice+the+mighty+among+us
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001622a.bin
18aafeb8f3c3fa416ee27f314ba0230773f2a3538e1bf1740a57ab2a614fdada		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1622A 18024 bytes
font_01_sfnt_off0001914d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1914D 16792 bytes
font_02_sfnt_off0001a964.bin
66818cddf939b3e3d083d5a839324bc97b13852b271fe1cce00fc5d8ee2a8de9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A964 10824 bytes

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