Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d068c635f7cabd…

MALICIOUS

PDF

73.8 KB Created: 2020-12-25 21:37:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: fe95582a8a9381d3eef06fea705d815a SHA-1: cc2d1bbbd351c5e49c91c1358720e7eaf8627241 SHA-256: e8d068c635f7cabdc23204433a69dac7912dddf4f7913d44697d3fa8fb636a5a
162 Risk Score

Malware Insights

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

The PDF contains a lure related to unemployment benefits and embeds a link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URL suggest it's designed to lead the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://traffine.ru/strik?utm_term=pandemic+unemployment+assistance+pay+back In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379606/normal_5fa7d993a1619.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381534/normal_5fbde05ab3470.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/vajefam/rogobuwivudodum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65fa5877-4d1d-4d3c-bbb2-a120275d4d96/how_to_use_rem_bot_discord.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/service_leaflet_templates_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1db7b318-3e60-4128-8b99-299591186cee/81848020018.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/vabiragajagu.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/purchase_order_template_india.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/mujedivaxofeg.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/binder_cover_template_microsoft_word.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/fipojoretoxabon.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_off0000e259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE259 5432 bytes
SHA-256: 2b724d0fffbae8100c03df4aa2eb468f5b8a3346cc640b1b3fb9195d1bed7b03
font_01_sfnt_off0000f4c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C8 11100 bytes
SHA-256: 1da9343e93f83d19acaed94315067ecc37216ff3185cc7ec45f2653a9853b4cf

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