Malicious PDF — malware analysis report

Static analysis result for SHA-256 8470267e9027d6f0…

MALICIOUS

PDF

62.3 KB Created: 2021-07-17 22:38:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1ba6ec68e9e7d3cb5fd0e80e11daad2e SHA-1: aa6ea34e522ed830587307c3f0fb0ce7f11f5b5e SHA-256: 8470267e9027d6f07aee418b16e1921f56e57c00b4f817a89d574b392ff05199
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. Multiple heuristics indicate the presence of numerous links pointing to distinct hosts, many of which appear to be compromised or disposable. The document's structure and embedded links suggest an attempt to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7129

Heuristics 5

  • 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.
  • 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 http://extintoresorigen.com/images/editor/gajejofuz.pdf In PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/kubomowusapi.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/rf4chp6ns9m697j8vbkhne7d97/29922096001.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/7b90a9b962e1c0301039821fcd95a9f5/19438880601.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091d3491facd---dajudukizizuzuvo.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/1d9d2de17061852bd372b3d178ac4a9c/bokisazazikasuvojada.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/56571756347.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/83570101480.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/6356043266.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/81505470191.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1bf189b016---wutuvex.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/a6c23c678b0e97f8efc6e9b8839ad43a/japodowagesekokizezodoz.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b3152e196e3---zokogola.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/lucga69kp6hfcjpostn5huq5u2/minobifowewarimenej.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ad835354d4a---zuruxojididofefibi.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/29bcbf1137442c3dd347fc6444f9ca77/kinaguraxobixir.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/47774417131.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/53d8dd74be5d6f5ae98a690f28bfd8ea/werudajawe.pdfIn PDF document text
    • https://dienlanhbachkhoa.info/upload/files/miwilamuxowifitogodefavun.pdfIn PDF document text
    • http://hkxhjfc.ltd/uploads/files/20210713211359.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090dd959cd29---7824641238.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160730d536c770---zurebipenesopapa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=hpv+wart+in+mouthPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7F6 15160 bytes
SHA-256: d079e2030e54b76719c200ef60da19772125c00c4bbf6d3fd1941862818ebf5a
font_01_sfnt_off0000de7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1