Malicious PDF — malware analysis report

Static analysis result for SHA-256 e796ea85bb45f403…

MALICIOUS

PDF

80.4 KB Created: 2021-03-29 23:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 530d5024717973ae86652bf58ac16a76 SHA-1: f7ef97c9900702a81b19f5b37b9e4efaa3caa8d6 SHA-256: e796ea85bb45f403739a0e9b70ae4e3259b4fdb4ecc806a585504375230a5a67
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of a 'download button' lure further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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://baarspo.ru/strik?utm_term=paint.net+pour+macos PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401545/normal_60610d21845a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385214/normal_6032d2195a22c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453142/normal_6022dd5fe7556.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_6040f8291e9d2.pdfIn PDF document text
    • https://pimipile.weebly.com/uploads/1/3/4/8/134883166/cff72c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371495/normal_5fca265166263.pdfIn PDF document text
    • http://sputnews.com/best_guided_tours_of_europe_for_familiesag2vu.pdfIn PDF document text
    • https://cdn.sqhk.co/wemitupu/djajhhg/2021_oscar_nominations_best_picture.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500878/normal_602f9c7a7c2dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373261/normal_603c36d35953e.pdfIn PDF document text
    • https://pebarefilegiz.weebly.com/uploads/1/3/5/3/135325086/vovalofefobe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489844/normal_602231f370c36.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.website/niteveore2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392195/normal_5fd0552c4f2ac.pdfIn PDF document text
    • https://cdn.sqhk.co/genonitag/djiqih2/gq_shirt_collar_guide.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/sesijesule/delalonoxutu.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/95031760563.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/mudexegid.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/pixazajeridawalum.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/44473784596.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_off0000fcb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB0 5080 bytes
SHA-256: 9959a45fbe0594d69030013054eddd41bb7ebcb2e8ab0597876117611df91733
font_01_sfnt_off00010de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE5 12064 bytes
SHA-256: afa897cfdfad1cb509edfdd6e849629c6350b9ab3693e290c673a8797584d86e

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