Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b212f930c92704…

MALICIOUS

PDF

97.6 KB Created: 2021-06-20 00:50:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 68573e4c7fa358807ce13171c309b3fe SHA-1: 3ae95a3c1a07d6796c72c918c1063dc8715e1430 SHA-256: 80b212f930c92704808bbd2c8294fa2c521812426a00467f51cb6a859a0a772f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple compromised WordPress sites, a common tactic for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs suggest the document is designed to lure users to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • 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://queensflower.nl/clientfiles/37829245249.pdf In PDF document text
    • http://mwflower.com/upimagesfile/%5C/40565188233.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c406970872c---rabodavogeweba.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/10afefecb7110532e995e86eddcc60c9/39956994683.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/sawaxeba.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070ef4b739e7---jirixosodaj.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/ed78fa81d00889fcae1ccae35d682bcd/33932771146.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c81ccf0181---61642709429.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16091dc74b401d---12124307821.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb3dd2e67a---birewe.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/cthgfcpol8m1v9enrf5eu19jpr/90442949654.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16086a4385efdf---57211541498.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/luniragevomedakuladegemip.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/e3udrfjqi5km3h11a862hvmrs9/92581773148.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/56a4a6def2dea733bf35fcba6820a7be/ganudosotajikitemewod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=starlink+coverage+mapPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C15 5388 bytes
SHA-256: 01928b42f9a14d2f27d496da345577874257a20b745af284c384372a6eb8bd34
font_01_sfnt_off00013eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EED 5300 bytes
SHA-256: 772be354e6cbc96861a29f152608d1abfc0444dd972f84fcb8f14db7b8b46928
font_02_sfnt_off000150e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150E9 11948 bytes
SHA-256: b5d74d8afda125349f772340df478e315ef4066bdddde05a0e8b5abae405f2c0