Malicious PDF — malware analysis report

Static analysis result for SHA-256 9852ea65333faf9c…

MALICIOUS

PDF

69.6 KB Created: 2021-02-17 00:40:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 06b1e591d2f0d87a51f266ae4b17b144 SHA-1: e18c0edd62c4521ffa0dac5129447596fceff1fe SHA-256: 9852ea65333faf9cc5fa757f1e23832d24405ad06572c4e974573d26442369b2
156 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 as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. The document contains numerous external links, suggesting it's part of a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the overall structure strongly suggest an attempt to exploit users through deceptive content, likely leading to further malware downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/strik?utm_term=cuanto+es+un+metro+cuadrado+en+pies PDF link annotation
    • https://jipofaxinevafud.weebly.com/uploads/1/3/4/3/134350183/da4047a38.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/a6tkhie/89377015193.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465537/normal_602af854c4a74.pdfIn PDF document text
    • https://cdn.sqhk.co/gidetixi/kJMjgiT/67861702577.pdfIn PDF document text
    • https://cdn.sqhk.co/gojelonub/gegchey/44134015070.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426572/normal_602a926ee9756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457590/normal_6016467c560fb.pdfIn PDF document text
    • https://fofaxofik.weebly.com/uploads/1/3/4/5/134521529/gabitufemekitazo.pdfIn PDF document text
    • https://sitofozaliwi.weebly.com/uploads/1/3/4/3/134355749/romoruxamuvapa.pdfIn PDF document text
    • https://cdn.sqhk.co/xajamenujo/joMPJ7S/where_can_i_buy_police_scanner_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/tivanosox/jthZjgi/best_offline_gps_tracking_app_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/zovifesojeme/hbOJDid/36329179818.pdfIn PDF document text
    • https://cdn.sqhk.co/bejomewuv/gfjiha4/mino_monsters_2_evolution_download_for_pc.pdfIn PDF document text
    • https://liwifaxuje.weebly.com/uploads/1/3/0/8/130874244/wezisoxefabej_jubudowa_kilodenefi_juzuno.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/takebemanijewok/gipavibemi.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/bootstrap_4_contact_form_with_validation_example.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/zafapufidexivuvowinojiwas.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/fubibunopunolinulonulufim.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/fokanoraj.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/30105171225.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_off0000d0d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D2 5092 bytes
SHA-256: 4f3a39ccdf56489bd9f106c33747373bd7c8c134279a5d5a89993326f9005e09
font_01_sfnt_off0000e208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE208 12000 bytes
SHA-256: fd912a2f5b543d94a03a79a742399578e9b6dd5d44d6f53dab29a896f261c554

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