Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5569291d738c3f0…

MALICIOUS

PDF

81.7 KB Created: 2020-12-17 23:51:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1267c8ece48b81e52db0453c64deed54 SHA-1: e6f76fa4ac5cfcb0ffc250fd4678bae21854a9ca SHA-256: d5569291d738c3f018741aa429d9ea3314482733befcc1d9d8aeeb55ba1e8dd7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a significant number of external links, with a critical heuristic identifying it as a link farm. The primary malicious URL identified is trafftec.ru, and another suspicious URL, tievexafo.weebly.com, is also present. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to 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
  • 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=mitch+charter+school+reviews PDF link annotation
    • https://tivexafo.weebly.com/uploads/1/3/4/3/134348633/kemerexe.pdfIn PDF document text
    • https://xopavomubikun.weebly.com/uploads/1/3/4/8/134879687/pozofedura.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/5fbce344be7cfc36344e8aaf/t/5fbf5d7d4f98375720d7c489/1606376830654/mega_man_4_gameboy_boss_order.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78acea4492a057e240f0a/t/5fcb66bf1415195da084c1b5/1607165632821/48711355173.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59ab6084698658e7e4eec/t/5fcc53fb05ddc9599d16cc1d/1607226363873/black_wallpaper_hd_4k_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/vepoludular.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf2f89ee0f32b8718edeb/1606284027058/heaviest_pokemon_of_all_time.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/neonatal_advanced_life_support_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/lefurujamoxujesudenedi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ea21e2fce462bc8c0024/t/5fc142ec3c02f22b9d3b635f/1606501101632/8935236595.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/icu_guidelines_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fced41fd131352a6a8a585e/t/5fd5f7e2acac596b0caf4f4d/1607858147316/18134103220.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/vokevipofukoxup.pdfIn PDF document text
    • https://s3.amazonaws.com/moxekibupuru/12616955135.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_off00010499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10499 5044 bytes
SHA-256: c2ae380b3a2962f1c097eea64d013ea0a8611c797a15767bdcb0c0ba67869b2d
font_01_sfnt_off000115dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DC 10580 bytes
SHA-256: 6fa07055c49885ab0f0b8d9520709d127dae1027900b1384c22faba36f73070f

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