Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ab9df97a442c106…

MALICIOUS

PDF

63.1 KB Created: 2020-12-25 20:07:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 2786b0878e9d527287d9ea26317a5b8f SHA-1: 43fca6576345a2f5d64b2c717f29e965cd43cb59 SHA-256: 0ab9df97a442c106f3107b7310f44389c806d4f56ebc1c651d69cbfc8d589a92
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links to external websites, many of which are likely part of a link farm designed to distribute malware or conduct phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'Mathias mhere songs 2019', aiming to trick users into clicking malicious links.

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://trafffe.ru/aws?utm_term=mathias+mhere+songs+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366652/normal_5f87697d528b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f877f601e8ec.pdfIn PDF document text
    • https://cdn.sqhk.co/momewoziwoge/jcjaOie/kunakowobasepusitid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485301/normal_5fa7f81058bae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486975/normal_5fb9ce69a6fc0.pdfIn PDF document text
    • https://fikuvigobe.weebly.com/uploads/1/3/4/5/134582673/kugesujapa_genoma_mizemubelazu.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluzezufe/YNjfwia/escape_the_prison_13_walkthrough_level_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416789/normal_5fd1e5a7451e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376126/normal_5f9444d158688.pdfIn PDF document text
    • https://dujuwugad.weebly.com/uploads/1/3/4/7/134721680/dovinipunel-nasivurowobako-moxomizo-buzabejakuvuzu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424043/normal_5fd833ee4f43f.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/fulazelof/packaged_drinking_water_plant_project_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/wowigagifuzakomovigevawat.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/some_basic_concepts_of_chemistry_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/degerutisig/ronap.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_off0000b5db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5DB 5556 bytes
SHA-256: ff525eb0b8f02651d9de46fc7d6a44ea4058930abee4f400001322c1b1f14c1a
font_01_sfnt_off0000c89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC89D 11540 bytes
SHA-256: 9ecd1a188022d1d2a07db49b605c152f80e23a2f6d8e18d7f3080b1f1a618d34

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