Malicious PDF — malware analysis report

Static analysis result for SHA-256 165c5c2ac4aabde1…

MALICIOUS

PDF

70.6 KB Created: 2021-06-08 22:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 23ed8691698ebef59eedb520a0c9b331 SHA-1: 91385a1b528cd6addc6f5bad1b3112cdee1d0fbd SHA-256: 165c5c2ac4aabde178ce54850075764f5254da0e58055da62ca9627b3cda4bfc
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://garglob.ru/pbw?utm_term=raja+ki+aayi+hai+baraat+full+hd+movie PDF link annotation
    • https://lepivigodegobuz.weebly.com/uploads/1/3/7/5/137505729/9301842.pdfIn PDF document text
    • https://suguvojonejufo.weebly.com/uploads/1/3/4/5/134585364/nuzijotuwaba.pdfIn PDF document text
    • https://xipunozelizu.weebly.com/uploads/1/3/1/3/131382486/ca07c81d2abe4.pdfIn PDF document text
    • https://befofevaz.weebly.com/uploads/1/3/0/9/130969220/lilub-xerisuxojopi-lazomudo-levabam.pdfIn PDF document text
    • https://kitetunevoneg.weebly.com/uploads/1/3/4/7/134703129/7540372.pdfIn PDF document text
    • https://fokifukamanur.weebly.com/uploads/1/3/0/8/130874497/wenufojadilofeg-mudow.pdfIn PDF document text
    • https://zizusufake.weebly.com/uploads/1/3/4/6/134646877/32772d5183b3.pdfIn PDF document text
    • https://zexorekimapuwip.weebly.com/uploads/1/3/4/7/134702453/9560782.pdfIn PDF document text
    • https://xesisezedowajax.weebly.com/uploads/1/3/4/7/134729639/vepumizulirogafimoga.pdfIn PDF document text
    • https://jatuvukaxakepu.weebly.com/uploads/1/3/4/3/134313635/binawuwefadin.pdfIn PDF document text
    • https://rinojoxo.weebly.com/uploads/1/3/4/5/134598976/tifalejokigojo.pdfIn PDF document text
    • https://rulafusojuxibaw.weebly.com/uploads/1/3/4/2/134265871/tujaralama.pdfIn PDF document text
    • https://kavuwaxexo.weebly.com/uploads/1/3/5/3/135351152/6477818.pdfIn PDF document text
    • https://zatibuvox.weebly.com/uploads/1/3/0/7/130738619/488847.pdfIn PDF document text
    • https://senabexe.weebly.com/uploads/1/3/4/2/134265557/7878676.pdfIn PDF document text
    • https://zudovizu.weebly.com/uploads/1/3/4/3/134338339/volazogosabanuras.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zekodunu.pbworks.com/w/file/fetch/144597447/vegan_meal_plan_for_female_bodybuilder.pdfIn PDF document text
    • http://disisopaz.pbworks.com/w/file/fetch/144562293/roblox_sword_texture_id_list.pdfIn PDF document text
    • http://nuxawakaxaz.pbworks.com/f/woseropomajuwefovivuva.pdfIn PDF document text
    • http://dadilotofexi.pbworks.com/w/file/fetch/144883377/lumame.pdfIn PDF document text
    • http://favixose.pbworks.com/w/file/fetch/144568098/vubalezurajonosotipaz.pdfIn 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_off0000d54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54B 5420 bytes
SHA-256: 561e241e3a8efbc692332d9f7d94b3beafc720f47dd5641c3d4841c14df73d1f
font_01_sfnt_off0000e7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A9 10456 bytes
SHA-256: 9d2b293587e76c9f54275bf37668e1b30e4fdb91c3732da3d1c0f0b33f8c9562