Malicious PDF — malware analysis report

Static analysis result for SHA-256 d396f8cee6ede8ca…

MALICIOUS

PDF

70.7 KB Created: 2020-12-26 23:10:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9ad27a6737046bfbe8bb71141fde2000 SHA-1: 926d0f4e9008958652afa2b0b98fa7609ff6d558 SHA-256: d396f8cee6ede8ca78891fc8f03250233e4163e9380f6ffbf0290bf4e9abd728
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent external URI, 'https://trafffe.ru/aws?utm_term=automotive+can+bus+system+pdf', suggests a deceptive attempt to manipulate search engine results or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO abuse.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/aws?utm_term=automotive+can+bus+system+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f9c7d15c8ab6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369514/normal_5f89b150c3dd7.pdfIn PDF document text
    • https://metoxuxiduwano.weebly.com/uploads/1/3/1/6/131636764/jonigudawenanade.pdfIn PDF document text
    • https://cdn.sqhk.co/godajaxox/hgiIhco/lifajabupanudebitamubosef.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/guwutivupudutu/90959139378.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/circular_saw_guide_jig.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/dota_underlords_guide_october_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/fe_building_pastebin.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/51959830879.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/barbour_bedale_fit_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/25605122854.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_off0000d6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FA 5464 bytes
SHA-256: 4b2aa49d1bf593c58177b7170481be36ce635d8bc9f6ee1cd1dbe87ac61003b7
font_01_sfnt_off0000e98e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98E 10676 bytes
SHA-256: ab3a9c6f1bb538562d405bcda912c6111f5d40785f7ee59ec8aef7d597b13d7b

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