Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2ad66079e183f66…

MALICIOUS

PDF

73.2 KB Created: 2021-02-26 13:54:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 946a6c64de9acdc3a83e2d43c2f55cd2 SHA-1: ff782078e16863da571d86178edcf820529b2b1c SHA-256: d2ad66079e183f66cbfcb96215c19229b7ba0b2ecd494d9c5e67e190ff78699c
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

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://pelibifir.ru/strik?utm_term=how+do+i+start+in+politics PDF link annotation
    • https://kaperimivegorew.weebly.com/uploads/1/3/4/3/134371305/8327891.pdfIn PDF document text
    • http://itawegan.space/kawuwipolixemuzumede75l6o.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/craftsman_leaf_blower_bag_attachment.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/cyHgjC2/free_get_app_iphone_7.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/pgejgWz/95737493914.pdfIn PDF document text
    • https://cdn.sqhk.co/gixelotopa/m1idphh/the_american_president_speech_movie.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/what_are_defensive_driving_skills.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/iFuhjib/707530943.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/viruko.pdfIn PDF document text
    • https://ruliduwaj.weebly.com/uploads/1/3/4/0/134016670/6720994.pdfIn PDF document text
    • http://xsale.trade/33871400291oe52v.pdfIn PDF document text
    • https://daputonekamipit.weebly.com/uploads/1/3/0/7/130775603/8529730.pdfIn PDF document text
    • http://dorulezebum.sportsontheweb.net/16317731724.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/disoluxepasanomuju.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/palevijuj/metformina_presentaciones_en_mexico.pdfIn PDF document text
    • http://rivenoke.onlinewebshop.net/they_poured_fire_on_us_from_the_sky_quotes_with_page_numbers.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/61919924832.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_off0000e472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE472 5120 bytes
SHA-256: dcf2962a7fe6a037c06ded203314dcd9b9fa2069db6ece40235edf2d13986656
font_01_sfnt_off0000f5f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F9 9868 bytes
SHA-256: 42c8aa6d1cd7874f1d4e9a52fcd3223af23c473ba4686070273a466d39a74525

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