Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b02aaeab12e79e…

MALICIOUS

PDF

71.4 KB Created: 2020-11-19 12:13:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9749700bef79433db8e84d4a07bd6504 SHA-1: 8a56248f9057756f7a1c3cf846eada8c488a67da SHA-256: 32b02aaeab12e79ee8a7a877773e6f2d76df25cc8f23ffb17bd882cd1ae20fbf
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many pointing to disposable hosting services like Weebly, indicative of a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these linked PDFs. The presence of a 'download' button heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafficel.ru/strik?utm_term=world+war+2+worksheets+printables PDF link annotation
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/9542354.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464850/normal_5fa67b593795c.pdfIn PDF document text
    • https://jimagofer.weebly.com/uploads/1/3/0/8/130813953/jepedirirebewazo.pdfIn PDF document text
    • https://xelabuxu.weebly.com/uploads/1/3/4/2/134235382/jumej-sogimiwategegaw-guwufuvutoja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372086/normal_5f89b0d492ac8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420600/normal_5f9dabfab5971.pdfIn PDF document text
    • https://raxuzorufureraw.weebly.com/uploads/1/3/0/7/130775378/pixidu-nekisiniwemavu-kovejiwevoki.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/4637410.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416301/normal_5f9b2ccde6863.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/149880de89864c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369796/normal_5faef11205ed8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/welutizenop/xofilu.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/big_sky_property_management_butte_mt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9be1ec47-a01c-4bf2-86d7-4cf39b5a6f2d/sewekudi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC02 5276 bytes
SHA-256: 797ea0b43fafefe4d2ac42961cdfece439564dbddb761e5a7cae8eb9f5fca442
font_01_sfnt_off0000ddfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFC 10720 bytes
SHA-256: 613524355d7237e5a5cd13ccf5775bd41c9e4d082daecaaa944e7642ea0b883f
font_02_sfnt_off000102bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BD 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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