Malicious PDF — malware analysis report

Static analysis result for SHA-256 c282f616c24076bd…

MALICIOUS

PDF

79.1 KB Created: 2021-09-03 03:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3096dca3916aa36eb736a32e7b6fe46f SHA-1: 724a76b12cdd8b93ba621a9786ab9642eae5d530 SHA-256: c282f616c24076bd52fa949f15871abd9b920b50a1fce28a880fd1404a3a1796
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Static analysis reveals it functions as a link farm, containing numerous URLs pointing to various websites, many of which are hosted on compromised WordPress installations. These links are likely intended to lure users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3497

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://smidgel.ru/uplcv?utm_term=ncert+biology+class+12+chapter+16+pdf PDF link annotation
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/fae22e54ee2fdbdf0276c3e5727fdb61/zevavobupul.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/91ouic45q01lu8neunnhbb1r15/nowelunajimasibezixat.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7804b673d6---71996117327.pdfIn PDF document text
    • http://ibookingkr.com/FileData/ckfinder/files/20210731_6554DB06F3B720C0.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/e6nmamgkapl3tv8l76ds9a87e4/50867016351.pdfIn PDF document text
    • http://ipublicity.cz/data/file/limomajik.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/di2l7h07mfj1q552k7bb238bst/saposubaw.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/93600758679.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798f4366cb5---55027831157.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/tvf6p1vjglfvloov6bi4tc7338/90575846422.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c88a3947b3b---11950434458.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb2bd5a474---29486254974.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c73614bfe37---jubesuzadifolotugeravexa.pdfIn PDF document text
    • https://art-lamps-rali.eu/files/file/85704484023.pdfIn PDF document text
    • http://anipetkingdom.com/webroot/img/files/pulej.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/09e3ae43db7d636ac2aa8720fe86ef7a/81085159733.pdfIn PDF document text
    • http://autoservizimensi.it/images/fck/file/43494444827.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/jasixojajizekuda.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b857fad4cbb---80195336350.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e7e324bd2---96656066521.pdfIn PDF document text
    • https://lysgaards.com/ckfinder/userfiles/files/11820004862.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8ad2e7b18---meliputoritanadino.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/lfnce03hrkooafjv812q13bial/lolazafumalugabimosikexu.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_off0000f471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF471 11368 bytes
SHA-256: ea57a4683d6311c5c0dcea5a2c1cb20d5e5133645bce066e8ccd42906678321d
font_01_sfnt_off00010f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1