Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae09dffef53c6d5…

MALICIOUS

PDF

71.5 KB Created: 2020-12-15 08:19:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e53ed56b431805dae25f80d94a27b7f SHA-1: 78fad528566dc10ec5e9d76fda0959a5a231d69f SHA-256: 0ae09dffef53c6d5a15b297c1e7897f286e93d60d7e60fee6884836bf90a21cc
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a link farm, with numerous external URLs embedded. One of these URLs, 'https://traffset.ru/123?utm_term=joey+pigza+swallowed+the+key+chapter+1+pdf', is flagged as unknown reputation and is likely the primary malicious destination. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/123?utm_term=joey+pigza+swallowed+the+key+chapter+1+pdf
    • https://mitenipup.weebly.com/uploads/1/3/4/3/134363071/1f723271c.pdf
    • https://jatasurow.weebly.com/uploads/1/3/4/3/134358583/rujasiwukezeme_lesazibej_bakefakobo_fizap.pdf
    • https://zokevuwokonumez.weebly.com/uploads/1/3/4/6/134682223/sojine.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc6cb9efc603311fbf61aa6/t/5fc77b5e8f079636157c3e52/1606908779038/best_bid_sniper_for_ebay.pdf
    • https://static1.squarespace.com/static/5fbffbf92e34347c703edab4/t/5fc16e904f98375720158b9f/1606512273519/boomilever_designs_2020.pdf
    • https://uploads.strikinglycdn.com/files/a374bf5b-e84a-4b5d-a44e-720a7b06e6f0/568_form_2014.pdf
    • https://static1.squarespace.com/static/5fc697d2bd14ff0dd2c40102/t/5fceb0cf5c72243a4f124124/1607381200505/93995707157.pdf
    • https://s3.amazonaws.com/rirusozo/22846820886.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf04618e72e5fdb9bb4d4/1606283334677/35617021585.pdf
    • https://uploads.strikinglycdn.com/files/679cc418-94a9-458b-b712-167183eaa5e9/notamukof.pdf
    • https://s3.amazonaws.com/tizowodifi/butow.pdf
    • https://s3.amazonaws.com/zuxadol/administrative_procedures_for_the_canadian_office.pdf
    • https://uploads.strikinglycdn.com/files/b00a85dd-a682-43bf-9272-df15bd9ebe1b/58967418616.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf55f09b1ed03538d1ffd7/1606374897088/wilder_vs_fury_reddit_live_stream.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da63.bin
a2ae0eecbb65f067aabe7a97cde7fb7942a77bf343f37ada4a73b8d154bf88df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA63 5764 bytes
font_01_sfnt_off0000ee2f.bin
e6a9b609f46764bff0715d5cd9256323507f1108b0bdd86e53ab17e99ec96fcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2F 10164 bytes

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