Malicious PDF — malware analysis report

Static analysis result for SHA-256 39ef296d0606aea2…

MALICIOUS

PDF

83.7 KB Created: 2021-03-14 07:50:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6fffe03069208f85e0374420359d79f3 SHA-1: 6205efc401ddb654fe79d644662e76a064c0617b SHA-256: 39ef296d0606aea260ec7f09a05075ad785d69710a825d3b89886cbe2a6339b3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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 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.
  • 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://dafemum.ru/123?utm_term=best+manual+espresso+machine+for+home PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451047/normal_5fe6e9b32e3c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427821/normal_5fce4bddb9e9b.pdfIn PDF document text
    • https://godobinoka.weebly.com/uploads/1/3/0/8/130815080/2493109.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471948/normal_6019d78ee99fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370525/normal_5fcef5ec4d954.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/iwjihfw/bawodififipujugijulupe.pdfIn PDF document text
    • https://cdn.sqhk.co/felodunom/bTjaOgd/zonosujodazare.pdfIn PDF document text
    • https://cdn.sqhk.co/xovatagemi/ibtvIge/talion_shadow_of_war_voice_actor.pdfIn PDF document text
    • https://wojedebaroz.weebly.com/uploads/1/3/1/6/131637691/bd9841377ca5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389603/normal_604d473fccb7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387412/normal_6016c85fb2a03.pdfIn PDF document text
    • https://dagigofeno.weebly.com/uploads/1/3/4/8/134887245/xufaturi.pdfIn PDF document text
    • https://rafopovuweke.weebly.com/uploads/1/3/2/7/132740485/zapekatogew-jusorenuwiz-lasifigob-nulemevo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465688/normal_603546dc45769.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403413/normal_5feb19cc2f37b.pdfIn PDF document text
    • https://cdn.sqhk.co/kakapoxavu/ijifYjh/world_nature_wallpaper_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/bigf1z0/avtosh_2_charx_1._2.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/temujonuwu/fodunivejovewa.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/free_templates_for_adobe_premiere_pro_cc.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/funatuluwemuvim.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/biceps_workout_at_home_without_equipment.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/romeo_and_juliet_1996_full_movie_free_streaming.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/salvage_title_2010_camaro_ss_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/34518481127.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_off00010a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5B 5304 bytes
SHA-256: 7bb0c5366371a5d869f7be771f3de2e4bc6d9b99ab07af4d82541acb2effc20c
font_01_sfnt_off00011c3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C3A 10984 bytes
SHA-256: aa41111f10a62d2b781841905e4d9f1768f2bf3b1afed8cbc6828f76ba73f631

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