Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b2fd9799a9079c…

MALICIOUS

PDF

87.6 KB Created: 2021-08-24 13:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d83fe42e388ae247098b1a48c817dcda SHA-1: ef5910da41646e48eb4ee47b8a323f1ea7f97505 SHA-256: e2b2fd9799a9079c584f6d534863b58b692aa3201d6734476bea01c39fcf41b3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs that point to compromised websites, likely serving as a distribution point for phishing or malware. The presence of multiple links on disposable hosting and compromised CMS upload storage further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9dd3ea3612---85861754954.pdf In PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/5639281df1e5d32ec7f78a19d5aa5e05/27862003334.pdfIn PDF document text
    • http://citysuji.com/ckfinder/userfiles/files/66173064965.pdfIn PDF document text
    • http://dztechfin.com/upload/file///59632253084.pdfIn PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/dutovizuselilewasulawog.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075958b9afe1---wosekebezerow.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/cced598affb6b69bd0094fc45c48fde7/46004907447.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/77551280323.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6b2e92854---8622172167.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e179a087d---kowagozix.pdfIn PDF document text
    • https://ikincielinmak.com/upload/ckfinder/files/6411401354.pdfIn PDF document text
    • https://xyoaa.org/sites/default/files/files/40464610950.pdfIn PDF document text
    • https://kebecelectrique.com/upload/editor/file/suvetipuvuwuk.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/7065510ef1aa5aedab92a0d6ece64101/zavikomejakuvatefes.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/53680099599.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c97ea4a011---21911685027.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/sotatulawidiwejiliwi.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/d8fab365fbf6519cdf5d699fb57ccf3c/5360234589.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609434b6084b7---tepar.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/88608291319.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/1700a35c6b6156f320f47fef5f58246d/59702219920.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/40167470923.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/bmcktn2m7ea160ookpp7lrekr8/7900934438.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/mekosedo.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/50509218700.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=corporate+accounting+one+word+questions+and+answersPDF 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_off0000f2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F8 16868 bytes
SHA-256: 0c681956da253b0acd94cb867fc9a0a773ed4d6846dd39539dc105745c2de3dd
font_01_sfnt_off00011ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001370a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1370A 11008 bytes
SHA-256: 69dbf4788f37e2368a57a9d90628f5ea4e2ee91a2340fd198d5433b4f57d79b0