Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd45c9ca4f84d5f…

MALICIOUS

PDF

67.6 KB Created: 2020-12-01 22:46:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f8f7986ab09d38d2e433f92d790133a0 SHA-1: d6e482a699af1b2a7e62476887097828e4f941bb SHA-256: 0dd45c9ca4f84d5f453dce53bd40dab65ac961ca026c83cdc554697bf3f9ca70
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to SEO-optimized PDF documents, suggesting a link farm for SEO manipulation or phishing. The primary malicious URL identified is trafftec.ru, which is likely used to host a phishing page or a second-stage payload. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafftec.ru/strik?utm_term=pcusa+book+of+order+2019+pdf PDF link annotation
    • https://vuvofazomegudej.weebly.com/uploads/1/3/4/3/134329778/4875933.pdfIn PDF document text
    • https://fusajebotiv.weebly.com/uploads/1/3/4/3/134320253/nulasigakomaf.pdfIn PDF document text
    • https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/sugebo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc109232cf09257bd6ccb44/t/5fc360c81972c46e3c09401d/1606639817361/dbq_on_second_industrial_revolution_essay.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfe895e5c7695ca99606f9/t/5fc0eeaebc819f1cf4f9a6fc/1606479535406/lowanatug.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf65c1af5bf52c326bd92/1606219359483/zefifoge.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10304b8467722f1d4df02/t/5fc304df9ee0f32b87b6fb6d/1606616288093/97917852932.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/video_downloader_chrome_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/einstein_s_particle_theory_of_light.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ed1560f2895dc1e7fe11/t/5fc10b894e98326c02354a12/1606486921772/8172497489.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB12 4232 bytes
SHA-256: c21def1f0e20b09ef306bdbb2c439147526da64da084e8d880901831e8c72a36
font_01_sfnt_off0000c9fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9FA 5804 bytes
SHA-256: 5e33bfcd2aaf6a5750f0cce920c112d6c1f0947a6aa0d0f9d373a13847ed553d
font_02_sfnt_off0000ddcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCC 10308 bytes
SHA-256: 7dbe3b3a58f85fe71ee5047bbcb8f006a1b5ae21536e1a83294b0b0691919b29

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