Malicious PDF — malware analysis report

Static analysis result for SHA-256 972f9baab0a3b629…

MALICIOUS

PDF

71.4 KB Created: 2021-02-24 19:25:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 94dc454999b1b7347abea3107fed30f2 SHA-1: f182dc5b89a6547d4abbc9104ac443217d6993d8 SHA-256: 972f9baab0a3b629071baccd7eadb584619173bb1868a7dbeec16d61c163fb91
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF document contains numerous external links, many of which point to disposable hosting, and is flagged as a link farm. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely provides instructions to decrypt a password-protected archive, a common tactic to bypass gateway scanning. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://jacksth.ru/strik?utm_term=viper+smart+start+instructions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379377/normal_6022c19976f7b.pdfIn PDF document text
    • https://cdn.sqhk.co/vobevufubito/Pgjjhjj/38639068372.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467571/normal_5fdad24456b22.pdfIn PDF document text
    • https://cdn.sqhk.co/tefaxobaf/hfgjban/exoskeleton_technology_stocks.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/z5sibhc/purudixukokifebifuza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413475/normal_6026a918a34c8.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/nopotafatox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368228/normal_5fe48bef506d2.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/murray_6.5_hp_lawn_mower_spark_plug.pdfIn PDF document text
    • https://cdn.sqhk.co/mamabukalom/rAifUI0/hello_kitty_fashion_star_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jirowolad/8WJijjb/mizotoj.pdfIn PDF document text
    • http://feseburowikuted.22web.org/wuxanusuzi.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/jaVBgcm/gta_vice_city_zombie_game_download.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/46311543345.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/tripura_rahasya_hindi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zazujipediwa.rf.gd/26620894719.pdfIn PDF document text
    • http://xajamojepoz.rf.gd/architectural_photography_books.pdfIn PDF document text
    • http://gonidiwofove.epizy.com/tecnologia_e_informatica_definicion.pdfIn PDF document text
    • http://vogojitipam.epizy.com/wugowumifukiwobopiduwex.pdfIn PDF document text
    • http://sizatopus.rf.gd/zeselaromamo.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_off0000db7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7F 5012 bytes
SHA-256: 87f754ebc2b7c956d523d0fadc070a749ed14265efd43c06d419f4ebfa119dd0
font_01_sfnt_off0000ec79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC79 10688 bytes
SHA-256: dfb6aef035a024e69d079147cf90822b460ba2f014eb6714c112387d478879fe

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