Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc4a1f56c2f34caf…

MALICIOUS

PDF

75.8 KB Created: 2020-11-12 22:55:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1e718e102ea166c62bc392f5001deb3b SHA-1: b9139d2fd80653cae8797e5973e559af7e0a64f1 SHA-256: bc4a1f56c2f34caf6ac473fa8de19002abbbbfe84e5d4837f7c208f1e77ddbe0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing document and hosts a large number of external links, many of which are SEO-focused. The embedded URL 'https://trafffe.ru/strik?utm_term=forklift+driver+resume+sample' suggests a lure related to job applications. Although no scripts were explicitly extracted, the PDF structure and the presence of external links strongly suggest an attempt to redirect users to malicious websites, likely for credential harvesting or malware delivery.

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://trafffe.ru/strik?utm_term=forklift+driver+resume+sample PDF link annotation
    • https://loroxiboziniluz.weebly.com/uploads/1/3/4/4/134402159/soxeranupur_zulikasorirum_jomogebejuxo.pdfIn PDF document text
    • https://zibefaxad.weebly.com/uploads/1/3/4/5/134594794/tovinamawopigume.pdfIn PDF document text
    • https://bazulerijodinib.weebly.com/uploads/1/3/1/8/131856415/9afe3d2.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/vegewafe.pdfIn PDF document text
    • https://xakasevam.weebly.com/uploads/1/3/4/5/134509313/1107690.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/lewuli/nejogonoxuka.pdfIn PDF document text
    • https://s3.amazonaws.com/waxejajinigafu/88672760660.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95cd7179-ece1-4c4b-8954-5f5508185a8c/silent_paint_remover_1100.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/under_the_rug_synonym.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/conjunctions_worksheet_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/areca_leaf_plates_project_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/xuwodujenazedonu.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/conrad_demarest_model_of_empires_greece.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_off0000da73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA73 5044 bytes
SHA-256: a038d233c098b40347176678d856390f41687c3fa2f590235dff8f1cd8365c11
font_01_sfnt_off0000eba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA3 11576 bytes
SHA-256: d8f065e23e17eaf7c8fe2de496f03dcf9602be5484b54886e6467dc7634c2e5f
font_02_sfnt_off000112f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F5 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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