Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c80582289c6c74c…

MALICIOUS

PDF

73.5 KB Created: 2021-02-22 09:43:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0e3555ff3cfe5243f832f22874ab9a41 SHA-1: bd526c75651dfa5de916250dddbee0879f1c5b75 SHA-256: 9c80582289c6c74c984a494249b20f926719f54ff433ef03a3dba50082743847
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, characteristic of a link farm used for SEO manipulation or phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://druttle.ru/wix?keyword=ford+think+manual+download PDF link annotation
    • http://5coupon.info/download_chess_strategy_for_beginnersdp9om.pdfIn PDF document text
    • https://rinavufapakoto.weebly.com/uploads/1/3/4/4/134460237/mikipim_zegibim_danidepapapesar_raxojinudesum.pdfIn PDF document text
    • http://creditscorehelp.info/bebas_kai_font_free96819.pdfIn PDF document text
    • https://tegidaweriwasul.weebly.com/uploads/1/3/1/4/131483440/tavudutagebona-xateboguvir-nabasokitexewu.pdfIn PDF document text
    • http://grusha.space/xutejelagetomekonosakeririucu3.pdfIn PDF document text
    • http://gogotmif.space/3333544358625zp3.pdfIn PDF document text
    • http://ing-cliente.com/dobovatupiwav7qaz.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/dWharie/68135296410.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/ibvzEhj/lemonade_shop_etsy.pdfIn PDF document text
    • https://fozujivopaj.weebly.com/uploads/1/3/5/3/135303700/daxezu.pdfIn PDF document text
    • http://hesap-al-sat.com/divinity_2_save_silent_monkso5bw8.pdfIn PDF document text
    • https://cdn.sqhk.co/fofasafiwi/haie6o6/47639230827.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/p7icvjd/guzuzujekajiwisuvona.pdfIn PDF document text
    • http://gogotmif.space/kingdom_hearts_world_of_chaos_guidedbkn5.pdfIn PDF document text
    • http://smilex.club/favopasuzevanewuwuncf8fq.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/ihgcRAo/long_square_acrylic_nails_tumblr.pdfIn PDF document text
    • https://cdn.sqhk.co/lebapivi/ihjbhhy/dora_the_explorer_world_adventure_full_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/gapobuzijiru/eRvMgc6/kunixibedux.pdfIn PDF document text
    • https://cdn.sqhk.co/lewivapawo/hbAy9xB/gemeverexubegadavebeboz.pdfIn PDF document text
    • http://1cats.space/638294043807t62o.pdfIn PDF document text
    • https://safubijob.weebly.com/uploads/1/3/2/6/132682970/2068596.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jolivawojo.rf.gd/rimapitofuk.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_off0000e58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58A 5000 bytes
SHA-256: 1ece638abfa6e478fce75af1e2538721140e2b391948c2ff529dc9d752893c0f
font_01_sfnt_off0000f66b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66B 9956 bytes
SHA-256: b6a972555d0ad8cad2b57b0668fbd72bcd4bb3005e77d49454cd27ee9fc7b6ac