Malicious PDF — malware analysis report

Static analysis result for SHA-256 938733fba3959f72…

MALICIOUS

PDF

80.2 KB Created: 2021-03-22 19:09:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: acdfb22d474ede7ab4650bb9c35440c4 SHA-1: 0b2e65993793c2f1df6dd13ae41bee7191da15d2 SHA-256: 938733fba3959f7238f86af997e9bb3d5782716434e889edc5fa6c00f97f1d84
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, with several pointing to disposable domains and potentially malicious content, suggesting a phishing or malware distribution scheme. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the link farm attack pattern.

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://nipisod.ru/award?keyword=cours+sur+l+afrique+berceau+de+l+humanit%25C3%25A9+pdf PDF link annotation
    • http://vazagitomis.mypressonline.com/morphology_and_ultrastructure_of_viruses.pdfIn PDF document text
    • http://tuzogat.sportsontheweb.net/belinda_bauer_snap.pdfIn PDF document text
    • http://rowexusaje.mypressonline.com/dsm_5_criteria_bipolar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488560/normal_6027954d2876a.pdfIn PDF document text
    • http://jenuxijaf.mygamesonline.org/63578425416.pdfIn PDF document text
    • http://waranijovuv.sportsontheweb.net/best_way_to_lose_weight_calorie_counting.pdfIn PDF document text
    • http://werojati.getenjoyment.net/does_hyundai_still_have_10_year_warranty.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459025/normal_5fe962ab6cf01.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f238abdf-92e3-4651-90df-65b6e8a648d9.filesusr.com/ugd/99965f_340f3f9885ff4054bbdfcf7b5ebee25c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xupimaral/24333548402.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/74348983987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/148d204b-c949-4f5d-8f59-58b86b5e0e51/how_to_get_cpr_certified_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01ef6f22-6d6b-428e-8c40-5c84b722cbfc/meade_etx-90ec_reviews.pdfIn PDF document text
    • http://jewofeket.onlinewebshop.net/emotional_intelligence_daniel_goleman_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/48546033767.pdfIn PDF document text
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_a9befe5835484edd8e1dd9048ce7b3b7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/528c96d4-95e9-48c2-8ee1-598bd4fe98f2/jiddu_krishnamurti_books_list.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/motorola_cp200xls_range.pdfIn PDF document text
    • https://3794eb9c-cc8b-492c-aecc-44533f76aaa6.filesusr.com/ugd/1ee69b_317b00f4172c47369c3bc97fd4bca2dd.pdf?index=trueIn 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 2

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_off0000f6f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F3 5708 bytes
SHA-256: a5ef51179479b269afa816c3816835da0da2e5e69001854b399cad84e4e12c49
font_01_sfnt_off000109de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DE 12464 bytes
SHA-256: 3b5a19c11a3afe50ef6f9215bbd6a6c50ae7335ea443d36ad0be99068e2eac60

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