Malicious PDF — malware analysis report

Static analysis result for SHA-256 47609af3e0cc10a5…

MALICIOUS

PDF

71.5 KB Created: 2021-09-24 17:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ce6022cdf7a524aecb9c994f99244b57 SHA-1: ebb18cbb4cc522ee84fc85f92e4876378cd2cae5 SHA-256: 47609af3e0cc10a5adf219b6717cac2345214ca5d18d1518fd29945a4ade163b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress sites, suggesting it is part of a phishing campaign to distribute malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the nature of the links suggest an attempt to trick users into downloading a secondary malicious file, likely a PDF, from a compromised host.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://akcjonariusz.com/UserFiles/file/pokew.pdf In PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130706dc9092---xerejupekalaw.pdfIn PDF document text
    • http://majedalkarkhi.com/pics/file/dokixuvuxida.pdfIn PDF document text
    • https://harshahometutors.com/uniformkontakt/userfiles/image/files/puzef.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16133f2b99c23b---dojilejimigogik.pdfPDF link annotation
    • https://profix.fr/ckfinder/userfiles/files/61342322398.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d53c3115d0---busodur.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b52b3ae52f---28663953204.pdfIn PDF document text
    • http://aedelsur.com/contenido/files/32718947873.pdfIn PDF document text
    • https://kimansion.com/uploads/file/tokibonawomuzivanav.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1614dc1b26dd8b---95896861553.pdfIn PDF document text
    • http://gabident.pl/local/userfiles/file/29580139816.pdfIn PDF document text
    • https://newshieldinsurance.com/demo/gsa/final/images/file/dowuj.pdfIn PDF document text
    • http://htbestcomputer.com/media/ftp/file/kapujunoromewaser.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/55567446791.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///xikuxikere.pdfIn PDF document text
    • http://gyliver.ru/files/files/92705100551.pdfIn PDF document text
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/sifefopavegemineru.pdfIn PDF document text
    • http://csc021.com/userfiles/file/20210908150747_fx45ue.pdfIn PDF document text
    • https://sklepbonus.eu/userfiles/file/morabivozugisivixuxer.pdfIn PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/12935704896.pdfIn PDF document text
    • http://xinshifm.com/userfiles/file/kavamizupuvo.pdfIn PDF document text
    • http://stellarvvv.ru/ckfinder/userfiles/files/37717416791.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=android+sdk+android_homePDF 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_off0000b20e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB20E 18204 bytes
SHA-256: e4db584dccde235337535de54a3786ad0a20c2d097daadca6b972cd7f1efec4b
font_01_sfnt_off0000e154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE154 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96B 10472 bytes
SHA-256: 2c2c69b55f9fd48b71ec4f8c25c279a1a1e719e0fbfa24b28012112e06672b6e

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