Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c9e92b83e2d329…

MALICIOUS

PDF

80.1 KB Created: 2021-03-18 11:48:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5f3cb8bdf760218a1cf9a4bb017f29bb SHA-1: 0ac082e269f17b1e7814d1a9cb158fa0eac57bb4 SHA-256: 27c9e92b83e2d32939a780202a6f3c72dc283322ded552b8798798ae4087759a
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 0.9998

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://leonvi.ru/wix?keyword=monocots+vs+dicots+examples PDF link annotation
    • https://vumokaxizojomij.weebly.com/uploads/1/3/2/6/132680848/vetusuxowesaseneru.pdfIn PDF document text
    • https://cdn.sqhk.co/gabadifofibo/hb1ijih/dj_mixer_app_download_apk_for_pc.pdfIn PDF document text
    • https://motonolezigit.weebly.com/uploads/1/3/2/8/132814123/4137663.pdfIn PDF document text
    • https://vijekufimukij.weebly.com/uploads/1/3/0/9/130969895/7091899.pdfIn PDF document text
    • https://jodegometokak.weebly.com/uploads/1/3/1/6/131606115/nerim.pdfIn PDF document text
    • https://dumunevebule.weebly.com/uploads/1/3/0/8/130874169/5588515.pdfIn PDF document text
    • https://cdn.sqhk.co/zipirevofu/iigjgs2/atomic_bomberman_voice_clips.pdfIn PDF document text
    • https://cdn.sqhk.co/tipusuzog/diidBhi/the_sims_bustin_out_skills_cheats_ps2.pdfIn PDF document text
    • https://cdn.sqhk.co/kujexelorite/jdhgPA8/texas_online_nursing_jurisprudence_exam_answers.pdfIn PDF document text
    • http://lirepenepubejix.iblogger.org/arya_movie_audio_naa_songs.pdfIn PDF document text
    • https://xekafifem.weebly.com/uploads/1/3/4/6/134669887/d967a7ea167e.pdfIn PDF document text
    • https://dapodufez.weebly.com/uploads/1/3/3/9/133997146/5cada5.pdfIn PDF document text
    • https://cdn.sqhk.co/timadupak/gL1V7F3/30363282959.pdfIn PDF document text
    • https://cdn.sqhk.co/renapudovi/Hidgfgg/mijimolirofigorudi.pdfIn PDF document text
    • https://cdn.sqhk.co/tokebamojos/zgeiiwt/27770796969.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/jolituzoji/trane_xe90_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/samsung_tv_7_series_vs_8_series.pdfIn PDF document text
    • http://gariravufur.epizy.com/unit_of_analysis_definition_research.pdfIn PDF document text
    • http://fariwugakek.rf.gd/37498791658.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC76 5256 bytes
SHA-256: 8d7a628f93816f163c837918010b90b40eff807d5da1a7f0f9cb198c6242240b
font_01_sfnt_off00010e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5F 10888 bytes
SHA-256: 715064f81d21881c89ea61795abf3336e18e2a0cd13ecaa03783dcffee1545b3

Open this report in the interactive analyzer, or submit your own file for analysis.