Malicious PDF — malware analysis report

Static analysis result for SHA-256 df01134315fd18fc…

MALICIOUS

PDF

72.5 KB Created: 2021-06-13 02:19:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 947a7c9e6a3dde4fd3c122a16de12251 SHA-1: 3cd413d0013f0892d93e48ec012fe153a7e9d90f SHA-256: df01134315fd18fc873e51e3ffa870f89c6db2ab5f3bfef41aa248ee67089e41
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and a phishing attempt, with a high ML classifier score and ClamAV detection. It contains numerous external links, many pointing to disposable hosting, suggesting an effort to direct users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malicious redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://cructi.ru/pbw?utm_term=network+kings+ccna+pdf PDF link annotation
    • https://nibuxapevu.weebly.com/uploads/1/3/4/6/134601724/1878241.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419193/normal_6054cf2d3a047.pdfIn PDF document text
    • https://tiralilibixadu.weebly.com/uploads/1/3/4/5/134500138/napeno_manozega.pdfIn PDF document text
    • https://pogipusuzifu.weebly.com/uploads/1/3/4/8/134869227/7407639.pdfIn PDF document text
    • https://tojewenegekov.weebly.com/uploads/1/3/4/5/134502344/lisekoju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494452/normal_5feda6a2a5bd7.pdfIn PDF document text
    • https://lopodegif.weebly.com/uploads/1/3/2/6/132695694/zumomerifowawerudejo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488817/normal_5fcb6846b66bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413458/normal_6035f940b65ca.pdfIn PDF document text
    • https://mozabedo.weebly.com/uploads/1/3/5/3/135323929/vopub_zikinoge_jawevuded.pdfIn PDF document text
    • https://zavavowufode.weebly.com/uploads/1/3/0/8/130814597/97014.pdfIn PDF document text
    • https://fawirato.weebly.com/uploads/1/3/5/3/135392883/negaz_tugikigilelop_vojuju.pdfIn PDF document text
    • https://samarobiratepiw.weebly.com/uploads/1/3/5/3/135327643/5171982b527.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://joriguzo.pbworks.com/f/tofixobimekuse.pdfIn PDF document text
    • http://ruxafonan.pbworks.com/f/22247601491.pdfIn PDF document text
    • http://wafijovodek.pbworks.com/w/file/fetch/145161732/blaze_black_and_volt_white.pdfIn PDF document text
    • http://tojasakamu.pbworks.com/w/file/fetch/145156560/luqman_e_hakeem_book.pdfIn PDF document text
    • http://mamejoniza.pbworks.com/f/minecraft_ice_and_fire_dragon_download.pdfIn PDF document text
    • http://xojipoxar.pbworks.com/f/45453703522.pdfIn PDF document text
    • http://podimil.pbworks.com/f/whittles_gait_analysis_free.pdfIn PDF document text
    • http://kelivesas.pbworks.com/w/file/fetch/144811773/6905849591.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_off0000dc1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1D 5416 bytes
SHA-256: 1a40fdaff8d2ee42d8d16149124e94daa0405853cf7422aa2050f31ca4289641
font_01_sfnt_off0000eebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBE 11132 bytes
SHA-256: 40a93752928839c3d38cd382c9cbb2ea9b79f859a289c656ec82f70ed1fdd4fa

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