Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c278efd249cd06…

MALICIOUS

PDF

88.8 KB Created: 2021-07-21 16:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2ed45d7bd431d0c6f2a8e49fac7d8453 SHA-1: aa05acb31e4ecb822eb9b6a596f0828e2b39c088 SHA-256: c6c278efd249cd06a19ccd66cf046011612046df6d54760717d66346ceb2f190
176 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. One URL specifically points to an IP address, indicating a direct attempt to host malicious content. The document's structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9410

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://dichvumoinoi.com/ckfinder/userfiles/files/33146626242.pdf In PDF document text
    • https://t2sc.me/userfiles/6449364445.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/3nvibo2tggifa64vjvm7457c63/fuxer.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/2bh3kq0p4p7pvd3bi9hq48na31/33466016089.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/5760751429.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/05dvvc5vrtuofb5kjjuvnfuc81/bebefalitozavejap.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb228d81be---parinosisuwefovinevedeb.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c4c4aae0c---puwebew.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084dbafc66a5---xemunomitapovativuw.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/69e45546a5099320b528f19a1ff48fa0/nuruwejotuxadubegu.pdfIn PDF document text
    • https://alrashed-alsaleh.com/userfiles/files/15661678979.pdfIn PDF document text
    • https://anakaygame.com/calisma2/files/uploads/masukedil.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/wurilaxomozuzimaz.pdfIn PDF document text
    • https://yepsell.com/userfiles/files/fatem.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084505176729---selisigofuge.pdfIn PDF document text
    • http://zuche0551.com/upload/file/wovixususexemodebimik.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/9120d15bec47dbd5b85e51ad20e44fe7/66064266242.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aca0cb00b94---43299823920.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eda88a1157---fipunobavivinuxagom.pdfPDF link annotation
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/c3ea64a1cb995178c3cba475e5e87dad/xomotutena.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607119aec3e47---32413981154.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/94511970113.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/78022977826.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/luxozenanul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=crossword+puzzles+answers+and+solutionsPDF link annotation
    • 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_off00010081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10081 10660 bytes
SHA-256: ad6600f079cad954c478e768cfaed9fb8dc2f3a0e1fe713ead811027a8a3ad98
font_01_sfnt_off00011925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11925 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13137 17328 bytes
SHA-256: f9b26effc5e7db7deb201c6d85e085af76b358012c971128a86b44cad77c3d09

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