Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd0173b13c3f56eb…

MALICIOUS

PDF

74.8 KB Created: 2020-12-23 00:40:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 7aaa8aa1c57740332b9b27c5a11fecbc SHA-1: df294d88f556b137b3a1b06caddf1e6b23ff393d SHA-256: dd0173b13c3f56ebb4370cffd18b7d786e0bcbe786ac72799f5e02d976ed87c5
156 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 phishing or malware distribution attempt. The document contains numerous external links, including one to 'traffset.ru', suggesting it's part of a link farm designed to redirect users. The presence of embedded URLs and the overall structure point towards an attempt to exploit users by luring them to malicious websites.

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
  • 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://traffset.ru/aws?utm_term=audacity+software+for+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467322/normal_5fa5b0090ee3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460473/normal_5fadf5d0a9cab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450733/normal_5fdc475be97dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f87357aaaf50.pdfIn PDF document text
    • https://texipajil.weebly.com/uploads/1/3/4/5/134523085/2534670.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489975/normal_5fcbc7e7bf437.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450419/normal_5f9e88a14d280.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/tetazino/65849363434.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/cet_bed_examination_2018_answer_key.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc504e1085bf90c0e179981/t/5fcecb795c8977691e2982b7/1607388027391/oregairu_hachiman_x_totsuka.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd02c92edfcd2bda92345e/1606222537841/unclaimed_property_act_nebraska.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/kusilonupo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce6cf0c965c74ca3dfdf93/t/5fd64e3bc4373837b9084c46/1607880252541/bcom_tm_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/jusapudizaratokuz.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_off0000e864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE864 5300 bytes
SHA-256: 262bc6b3a4bc9296cac01d1a07731a431f3bea9a6a6cacf1777415b47b017720
font_01_sfnt_off0000fa98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA98 10636 bytes
SHA-256: 3f979977020681ae03de3566160e6c6865dd281310abad27588073128c728f03

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