Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1f158c4434d7f5c…

MALICIOUS

PDF

72.0 KB Created: 2021-09-15 18:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 902d054bacff372503780d52c732820d SHA-1: b07c1d8cd1ea54e266db39486bed6d89c3b46fc2 SHA-256: c1f158c4434d7f5cd30ed681f491e6c1fa313c1f376253a85ab015f269090a02
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs pointing to a link farm, indicating a phishing or malware distribution attempt. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6630

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://kattliv.com/kattliv/admin/userfiles/file/82194304785.pdf In PDF document text
    • http://brianhaymore.com/images/e/file/12150330598.pdfIn PDF document text
    • http://www.investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/33644600271.pdfIn PDF document text
    • https://enerjimakine.com/tsrm1/img/userfiles/file/wobose.pdfIn PDF document text
    • http://alotercuman.com/ckfinder/userfiles/files/6757256645.pdfIn PDF document text
    • http://full814.com/upload/files/94118790927.pdfIn PDF document text
    • http://escuelasfutbol8.com/docs/files/14231656442.pdfIn PDF document text
    • https://guruamardaspublicschool.com/userfiles/files/41318477506.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140aedaf3532---pogoserazisapewe.pdfIn PDF document text
    • http://ritadas.in/userfiles/file/nuwosabafedirubafuga.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/32897698472.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210907220503.pdfIn PDF document text
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/barebopifaraxizazaxawiwo.pdfIn PDF document text
    • http://squash-fitness.cz/userfiles/file/migusobi.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/14759515446.pdfIn PDF document text
    • http://carbonelite.ru/file/zogozezejisopiwubegi.pdfIn PDF document text
    • http://rtm-plus.ru/ckfinder/userfiles/files/86709887167.pdfIn PDF document text
    • https://uleshuzatabc.hu/files/file/musaxovasoweridujorirat.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/91667100075.pdfIn PDF document text
    • https://rcvizovice.cz/ckfinder/userfiles/files/gedivotitibodowafunudazip.pdfIn PDF document text
    • https://www.jancsoalapitvany.hu/ckfinder/userfiles/files/35024790447.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/zafeke.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/karubotixibe.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142016dd91b4---1218192827.pdfIn PDF document text
    • https://farmaciasacoor.com/site/upload/file/bavigijab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=gta+5+in+android+phonePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE811 17620 bytes
SHA-256: c89dff43de21472371a7d3c836bf04f9dc71ddfcef08ef1fc654933fac60d96b

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