Malicious PDF — malware analysis report

Static analysis result for SHA-256 29391a6ff163915e…

MALICIOUS

PDF

66.1 KB Created: 2021-01-29 01:05:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 2773c132d55e7d84f34f37f75baed6ab SHA-1: 772e75b0d6f3ceb794597cd83a3b72c6892d06d8 SHA-256: 29391a6ff163915e4e72889226ef00f0e2a638bd1e8f0f70e9da6f64661a1d95
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs pointing to disposable hosting services and suspicious domains, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a link farm designed to redirect users to malicious content. Although no scripts were explicitly extracted, the presence of external URIs and the ML classifier's high confidence score point towards malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://jottigo.ru/123?utm_term=federal+work+study+supervisor+handbook PDF link annotation
    • https://mututekabifu.weebly.com/uploads/1/3/4/4/134466573/jepomevaziganas_xepaxer.pdfIn PDF document text
    • https://cdn.sqhk.co/kisesawaropo/jEOhfjg/vabelol.pdfIn PDF document text
    • https://gereveporona.weebly.com/uploads/1/3/0/7/130775593/zulezoluxi_novasoxodoreko_fukizow.pdfIn PDF document text
    • http://fruits-summer.fun/64251705473gsxjc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402247/normal_6009680938c04.pdfIn PDF document text
    • http://3bki.ru/51083549308gwsp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392199/normal_6003cd89512e8.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/iblhhgg/rorufem.pdfIn PDF document text
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/6936855.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451363/normal_5fca4cc3f0506.pdfIn PDF document text
    • http://idealicaitalia.website/vusesujowepovanibotetusebppo58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367631/normal_5feef4324c655.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369776/normal_5ffd995026a08.pdfIn PDF document text
    • https://cdn.sqhk.co/fujigugi/kgg2idg/bubble_bird_rescue_3_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/Sjj2Q9R/wwe_smackdown_live_main_event_ring.pdfIn PDF document text
    • https://cdn.sqhk.co/woxezelej/Lf9hefT/printable_template_for_snakes_and_ladders_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383918/normal_5fdf2acd6d121.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lezopobigeza/training_certification_form_template.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/3984313064.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/mla_citation_guide_8th_edition.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA38 5340 bytes
SHA-256: 5d1f264ba2c88ab9b1886f8adb15752c3ac1b15c49ae30161416f1cad07b438d
font_01_sfnt_off0000cc6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6B 9428 bytes
SHA-256: 5e5639b656bdafed993259e7e86fb9e21a91a0e90e80fabf4401d77295c07d69
font_02_sfnt_off0000ecb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB1 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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