Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ec640cc7d23655…

MALICIOUS

PDF

62.9 KB Created: 2021-02-22 03:37:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 535f6a868565364ecd2b351d5b8af031 SHA-1: 076b609c2642cc5b169873c31c82c50d555edf4e SHA-256: 63ec640cc7d236553cde85ea2cff4ab3311a296982fc515da73ab277abbc0374
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

Heuristics 5

  • 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 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://baarspo.ru/strik?utm_term=sap+bw+tutorial+youtube PDF link annotation
    • https://cdn.sqhk.co/jumifokujuje/gg0jbpw/zisipilejimut.pdfIn PDF document text
    • http://complect-tech.ru/juxolisogatizunitimoki4h8m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458412/normal_603216f4b93cc.pdfIn PDF document text
    • http://xogakijukutikep.22web.org/nemovoxotenisi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386851/normal_5fdd658c3f781.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456128/normal_601d837429248.pdfIn PDF document text
    • http://mkr-olimp.info/sesesukululzttq.pdfIn PDF document text
    • https://cdn.sqhk.co/popaxutu/q0hilib/demolition_derby_2020_ohio.pdfIn PDF document text
    • http://salestore.pro/61379197634kt1hw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386852/normal_5ff500f7165bd.pdfIn PDF document text
    • http://pijakonojimuw.iblogger.org/gilefugexaxokufal.pdfIn PDF document text
    • https://cdn.sqhk.co/dikabopagesi/tl1Dijw/jaime_lannister_armor_buy.pdfIn PDF document text
    • https://cdn.sqhk.co/dovoxukeni/hbhh6gh/srs_program_medicaid.pdfIn PDF document text
    • http://gisimijesizugo.22web.org/6-6_skills_practice_trapezoids_and_kites_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wujapu/amharic_fiction_book_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/xesusukexuwewuv.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/72607658095.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/creo_parametric_2._0_free_with_crack.pdfIn PDF document text
    • http://kagilabitivibe.epizy.com/weider_pro_4950_exercise_guide.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_off0000babc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBABC 5072 bytes
SHA-256: ff09b29d6c6f142eaf9748e9346f3bb17e00e39b09773047ea34279f93005257
font_01_sfnt_off0000cc1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1E 10292 bytes
SHA-256: a20130c1ad1c4f23ba9315e0d45732a22ea7b64763a4e2e3ddfee9a53161d914