Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f4edfa2546b2b80…

MALICIOUS

PDF

75.7 KB Created: 2021-03-28 00:32:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 2ccba51363d2df4cc714b0369db8d8f2 SHA-1: d9e69d0be52856206a1509fb21cd8e7b2d17dd4a SHA-256: 8f4edfa2546b2b80bfcc50489af880dadede8a3239e65bdf6a4a82d0c9197401
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download' button lure further supports a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://mezovuduw.ru/strik?utm_term=dungeons+and+dragons+campaign+builder PDF link annotation
    • http://jotusimemirido.sportsontheweb.net/gazegavunukadedopivinid.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/aGihhan/weren.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/92162454409.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/loguduvetepixelororupi.pdfIn PDF document text
    • http://domsale.xyz/what_kills_mimosa_treesog26a.pdfIn PDF document text
    • https://cdn.sqhk.co/wupofolizaj/Lhc0Wgi/absorption_of_lipids.pdfIn PDF document text
    • https://tidopotixasajev.weebly.com/uploads/1/3/0/7/130738881/tafiziwuvazafisedifu.pdfIn PDF document text
    • http://nowtorrentz.com/32678802037rt96p.pdfIn PDF document text
    • http://itdiscount.info/lofudevagenoxuxegejew057wc.pdfIn PDF document text
    • https://fukenavu.weebly.com/uploads/1/3/0/8/130813663/9908253.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6f81cef9-66a2-447d-9e1d-4c0427ef15c5.filesusr.com/ugd/4d935e_30a705799e944ed9b023c0695be448c3.pdf?index=trueIn PDF document text
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_9b2714ef8f9044bdb9e7a6dd0bfa86b2.pdf?index=trueIn PDF document text
    • https://6c639bf1-704a-4500-b661-329758898742.filesusr.com/ugd/02d620_17420b9cd66143e2925e306610c90acb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/neporezofov/prepositional_phrase_as_adjective_and_adverb_worksheet.pdfIn PDF document text
    • https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_43b5b6d94b9546d68267d4e90b6a8751.pdf?index=trueIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_51174abb1c5c4648ac7b6a911c18ef97.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/fimoxogowesogon.pdfIn PDF document text
    • http://kojenixerog.myartsonline.com/argumentative_essays.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/71273000773.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_off0000eb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB04 5532 bytes
SHA-256: ca60cbfc059fec9abe2e9bb8933ec7972754eb23b213faba2869f3157028ae7c
font_01_sfnt_off0000fdbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBC 10412 bytes
SHA-256: 777be6df8cdf94f40f2a29ebcb260db9203b81953255a906a5657980f4e02047

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