Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa5d8fe60a648802…

MALICIOUS

PDF

78.1 KB Created: 2021-08-09 01:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: b3ed83c6fe6a9cb4b8b2b4930728a256 SHA-1: 1b89aaa077aa5dbdbb3eb6e3ceced35f2fabaa56 SHA-256: fa5d8fe60a648802eee71397202de3d146c09b756edd5e72bed43320239d817f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5079

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://synerhu.ru/uplcv?utm_term=insulation+foam+board+philippines PDF link annotation
    • http://aklond.com/UploadFilesfile///2021072817013261.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/47765277238.pdfIn PDF document text
    • https://lukili.ch/UserFiles/files/kamiwekufowupapanadajowe.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b320a09e794---bomuwevupukugiba.pdfIn PDF document text
    • https://kfmaccounting.com/webroot/img/content/files/lasagetifupom.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/d7f1f14bc19b0ba136a772a82c95357e/tizovubimowotewunane.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/80215978229.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/53701528924.pdfIn PDF document text
    • https://ip-kamera-rendszer.hu/ckfinder/userfiles/files/35838183409.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd51c3df81---goxagaxakebetujape.pdfIn PDF document text
    • http://paoladebenedetti.eu/userfiles/files/zazoxuzagakivu.pdfIn PDF document text
    • https://bettyloupaints.com/userfiles/files/76132338071.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a461462200---83423529246.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078397d712f0---17465043098.pdfIn PDF document text
    • http://chieusangducphat.com/uploads/userfiles/file/wafibipox.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/34732676639.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/scso5i23m7tim14lkkvbn2ei02/duruxazota.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070cb0fcd0ac---lisexojen.pdfIn PDF document text
    • http://www.gesas.it/media/mailinglist/file/dokunovamilugenuj.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/divepirufedupazerosetutew.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d345322f6---59270776025.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/raperuferumexolafu.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb8b828e542---rufuw.pdfIn PDF document text
    • http://drkoopman.nl/cmsimages/file/85837054698.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ccc49377478---kiwugamibijiruwo.pdfIn PDF document text
    • 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_off0000eeb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB0 10952 bytes
SHA-256: b8229dc10bb62358ef0d51f3c7ef57fdd99f989ed7fb70bc651074f69dbdca12
font_01_sfnt_off0001079e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079E 19020 bytes
SHA-256: cdc5b9b53ac7f25dea3142407044e70454969a64128444a0641bf3c777e3e340

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