Malicious PDF — malware analysis report

Static analysis result for SHA-256 20b03cc7c50520d1…

MALICIOUS

PDF

77.7 KB Created: 2021-06-24 20:51:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 948f01f75421fab9c5721cd958ccac4f SHA-1: f51fbc28d861b24c3073c1295f47187ff26a0f63 SHA-256: 20b03cc7c50520d1f61531e78059131f5f1885fa803388d8f6c78ebb7576310f
154 Risk Score

Malware Insights

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

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 0.9897

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://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/197f64ea139ba8981c3024eb3acd4ac0/mafumosa.pdf In PDF document text
    • http://alhouti.com/userfiles/file/vusolezam.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/jqea08pq4ot69nrfiqpp2tlhfa/majafafosavesuri.pdfIn PDF document text
    • http://boissee.fr/userfiles/file/35690128590.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608229bc40053---34489585148.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160826f6306fa0---41337736526.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/ee3926dc12da66d22a3efa0e8542051d/78498274252.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a089be983a2---60846596084.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/cfa0a63be4b895b92ce1b9a5f65d2583/42475271555.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839a967b526---bujawewupumu.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/7av2oqfbjqfrqbmtjagalln9e9/badunalak.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/9o1tk246agi21dodfri8nhiah4/70210128845.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16078e87226413---wawizizakufezesekoxemuger.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/fafaponegupuledaxofugoje.pdfIn PDF document text
    • http://poiskvod.ru/images/file/25926803549.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8786ed417---joparowenuvan.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/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=contra+game+download+apkPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000effd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFD 2972 bytes
SHA-256: 6a961835775f2f04c4cbbc389e7595e82960d78c1828a3f7c48734963ed5ebd9
font_01_sfnt_off0000fa80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA80 5164 bytes
SHA-256: 80321f1c103f9056b0214285c35bba0f23a782e48801a7799532efa673f2de1c
font_02_sfnt_off00010c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C07 12872 bytes
SHA-256: 46a1a41f43bd1d2e11c0614b5b186bd3b231804538a898d452f13305b0cce252

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