Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe8204d783bbaf28…

MALICIOUS

PDF

89.5 KB Created: 2021-07-22 14:38:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 47fc2898b8c52a9d9e2a349d6f465c7d SHA-1: b5e8b75e6e252864090d0ee4f397f2b15f0ec409 SHA-256: fe8204d783bbaf287b94096e7b4d0fca62744e124264daec22dc37b83c4e7955
176 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and exhibits characteristics of a link farm, with numerous URLs pointing to compromised websites. The ML classifier also indicated a high probability of maliciousness. The document's structure and embedded URLs suggest an attempt to direct users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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 https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/51284021b0c2e0c21f2f20b2e534be5b/kawuxere.pdf In PDF document text
    • https://allmassage.net/upload/file/20210629024710.pdfIn PDF document text
    • http://okwecare.com/usr/userfiles/files/18994712182.pdfIn PDF document text
    • http://usagimatur.com/files/others/zikoluxuwiwum.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf10599758---58406024407.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/14983644254.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/n5t74c9mqimrlic5sfgen481ii/luxuk.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0f500fa81---29621206538.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/b4tktf546eicvg419q371e920a/jotomifu.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/sutamosokemi.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/razezaxilamolemuzogovak.pdfIn PDF document text
    • http://locthanhwindow.com/img_duhoc/files/mikikamod.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/huulf7g8dki9m8um2afekvnr44/99656450912.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/dfa55259437716e2fd74d864ec38b6df/18147917188.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/ttscuef4hmpjd227i0i2frfgo6/59380486402.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/80a0abe88a3e5aa214f3fdc4b05179da/69097821389.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f62a67564---22762129611.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/0da25102bf267e13951a6946f6faba67/70316015422.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/1t26qfpb2988iks2qhejkoq5ai/kiluputejenifu.pdfIn PDF document text
    • http://allasclub.com/campannas/file/30844654456.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/wewor.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098da06a115a---lizuxizezopejizidixiboku.pdfIn PDF document text
    • http://lblussana.it/images/file/66155886731.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/58160207345.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/gimevexugimopevik.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b40cef5593a---mokenamadezepukifamekepa.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16079c56b5dcfd---63601225831.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160714ee263ed8---40092381127.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=bc5+homeopathic+medicinePDF 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_off0000f7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AE 10652 bytes
SHA-256: 2bb0b134ae5e3366ebf57f27ec92d9cc700461169cf83eebc6a7e51deba74a33
font_01_sfnt_off00010fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FED 17720 bytes
SHA-256: 133087a7bbf76e35f3eaae4ec835aeebf1c12bebef2e6497cade593248fea0ee
font_02_sfnt_off00013ebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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