Malicious PDF — malware analysis report

Static analysis result for SHA-256 493cf4881b64b0de…

MALICIOUS

PDF

80.6 KB Created: 2021-01-24 00:13:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 37da4f18571f39ddb6ce397e22da3634 SHA-1: 1a8ff5e3a08c2805cefcb8fe27e08940935bf85f SHA-256: 493cf4881b64b0de3ce689b885a2865c8ee145c2ce5df19b94f1a04ce4e0c90a
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for a redirector link to 'traffmen.ru'. The ML classifier also assigned a high probability of maliciousness. The embedded URL and ClamAV detection suggest a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://traffmen.ru/123?utm_term=bollinger+tech+lab In PDF document text
    • https://static.s123-cdn-static.com/uploads/4374185/normal_5fcf9b58cc61e.pdfIn PDF document text
    • https://cdn.sqhk.co/luvutagawata/glidshh/drill_master_battery_charger.pdfIn PDF document text
    • http://najefot.22web.org/ataraxia_filosofia.pdfIn PDF document text
    • http://salejozokaboruz.22web.org/emulsion_polymerization_a_mechanistic_approach.pdfIn PDF document text
    • http://xojitufos.66ghz.com/wamukuwatujifedawobudikan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365628/normal_5ff66a1d89c1a.pdfIn PDF document text
    • http://riwuveroxuwox.66ghz.com/academia_research_grammar_test_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/peluxisomex/ao7Xqja/40331321205.pdfIn PDF document text
    • https://cdn.sqhk.co/jesisuvov/jeidghe/52665552117.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506200/normal_5fd103e371ed5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455681/normal_6003a84391afb.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/nuxomigo/34536171985.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/tewutajidises.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/hugo_boss_coat_size_guide.pdfIn PDF document text
    • http://nezopodadas.epizy.com/56681007508.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/50965535223.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/msbte_model_answer_paper_i_scheme_mechanical.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_off0000fbfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFA 5072 bytes
SHA-256: b21bbe477fed556972a230ed3dfb48d1b58152632c432564f32dbd822b9a94f4
font_01_sfnt_off00010d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D38 11268 bytes
SHA-256: a00ee7d81894ddbd0c5daef352b28592c20c38bdda60662464b816f0dd35bdc3

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