Malicious PDF — malware analysis report

Static analysis result for SHA-256 92c315af393c61a0…

MALICIOUS

PDF

86.7 KB Created: 2021-06-25 09:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c011e0f0c23b1532bcd698036e5334f7 SHA-1: 680fb8d26ed971db4955e499312b7dc7603bdaec SHA-256: 92c315af393c61a03ff231323eaf5743ca9580f7cc7e32e4225902ee77dedb71
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution campaign. The heuristic firings and ClamAV detection strongly indicate malicious intent, likely related to phishing by luring users to these external sites. No scripts were extracted, but the overall structure points to a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://huntic.ru/uplcv?utm_term=kind+of+shark+crossword+clue PDF link annotation
    • http://anhbanglaw.com/userfiles/file/xosejufonalibo.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160949fb98444f---gasozinogolakugizevupov.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/82361777300.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/67988591136.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/l7ooc7bp7a2ude6ntdmg9117be/polapegosib.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/inno8m8s7ao00d8n4i2ql1bu50/mivegezupan.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/86df0208d042acf8e417139d07fb8334/15499783938.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160722f9e5b2fb---14707170791.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/41869dbff0bd2111819300ea91e1c8cd/70356325066.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/2vvifqp3i15mk1lu7ms3io6i9t/lufizekiwuguzogedesoko.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8fe4cbed7---ruxat.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba1f72e60c---7388745530.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867db96fd95---23284344853.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081e61bca323---45475250409.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/0416mc8ge2n20hf3uqem1h7af5/fowunevogosu.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/f7614e674546db741ccad369538d8470/xamowixarumizilizoviwexe.pdfIn PDF document text
    • http://nensi.si/upload/file/gusobazerodikamew.pdfIn PDF document text
    • http://au-coeur-du-temps.com/userfiles/file/jizuti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E0 5236 bytes
SHA-256: f33c3ada424dbb1ce570633b58a8ecbd62365e1ff64a69939f19823f5503f1fb
font_01_sfnt_off000126bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126BC 11780 bytes
SHA-256: 0f59c65c66250f052dd2338ec991143eeae9f84e712d579eb92a4f65a9150d88