Malicious PDF — malware analysis report

Static analysis result for SHA-256 be2bbf5bf50ebe4a…

MALICIOUS

PDF

65.8 KB Created: 2021-02-02 12:34:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: fbc23b2d2f1c64bdc378677fdf2e0b4d SHA-1: 12957ca05e9e208445c2138ec04a6d00acbefe33 SHA-256: be2bbf5bf50ebe4ac93735162314898d66b8db97ef02fd9264f16931600ac58e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/123?utm_term=wheel+horse+tractor+parts+for+sale'. This URL is likely used to redirect users to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of a malicious link in a document disguised as tractor parts information suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/123?utm_term=wheel+horse+tractor+parts+for+sale In PDF document text
    • https://static.s123-cdn-static.com/uploads/4483856/normal_600146a3dcbbc.pdfIn PDF document text
    • https://cdn.sqhk.co/dodipenameki/RhT2hhQ/shot_bowling_green_ohio.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467325/normal_5ff66a5a5d262.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489969/normal_601729a88471c.pdfIn PDF document text
    • https://cdn.sqhk.co/dujagazatad/ieLCkzO/art_master_3d_2m.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/jhqhbPU/dekinutetirokupuxe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490366/normal_5ff22d575eaa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419828/normal_601262c27b967.pdfIn PDF document text
    • https://cdn.sqhk.co/razonavari/jjbhdoU/mega_ice_blast_marlboro.pdfIn PDF document text
    • https://cdn.sqhk.co/rewufarelaze/9ChagjS/95099188656.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384640/normal_6001017326e29.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/nitatotol/54165309027.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/33624441054.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/2111846307.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/t3_cura_luxe_hair_dryer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/voyage_a_venise_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/flame_test_lab_analysis_questions_answers.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_off0000c4a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A1 5116 bytes
SHA-256: 7fde93987b9f8297b40d595d17bd842fc12d0ac0b20c5f434822ecc42ecc3fe4
font_01_sfnt_off0000d60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60F 10584 bytes
SHA-256: 765153d8fca5f886dc3b8994dcc278cc10770980fc3a4c4804b8006fb82f6fd3

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