Malicious PDF — malware analysis report

Static analysis result for SHA-256 128764e29d4aa19f…

MALICIOUS

PDF

91.1 KB Created: 2020-11-25 03:03:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a3a2592d3ac172bbf3dc6e38934b070a SHA-1: bd6fd7dbc0908478012e628b7fe03c4f3be73c7e SHA-256: 128764e29d4aa19f3552d6199851afb7bb778646873c51231ff853ed72613a41
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector and a link farm. One of the primary links points to 'traffking.ru', a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

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.
  • 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.
  • 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://traffking.ru/aws?utm_term=light+lens+flare+png In PDF document text
    • https://cdn-cms.f-static.net/uploads/4415524/normal_5fb946d7e0f63.pdfIn PDF document text
    • https://rokudula.weebly.com/uploads/1/3/4/0/134017654/2966731.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408996/normal_5fbd9a3fb62ec.pdfIn PDF document text
    • https://sonojija.weebly.com/uploads/1/3/4/7/134723635/4d61a52.pdfIn PDF document text
    • https://sufimaxunexex.weebly.com/uploads/1/3/4/3/134345405/muvojidife.pdfIn PDF document text
    • https://nexolibevi.weebly.com/uploads/1/3/4/4/134463206/ab19a38ba85b66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387939/normal_5fb298493b032.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463277/normal_5fb886d454f26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380701/normal_5faa09093663c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427104/normal_5fb2b3fdbe224.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/gelawiweza/63321612135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aa7007c-aca3-4955-b2d1-01ceb5a91e90/23791517313.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70668933-0bcd-4cc7-ace6-da15a7fa1a21/st_louis_blues_tenor_sax_sheet_music.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_off00012b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B0A 5104 bytes
SHA-256: 19863ad077f6bd0e282e40522b1143023ba4dca37c06091b08b1b7347ae17ab9
font_01_sfnt_off00013c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C6B 10572 bytes
SHA-256: 20dbc7d80c72fdfb6272f745ff5508e8776e6c200b5a75692add363f0b977598

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