Malicious PDF — malware analysis report

Static analysis result for SHA-256 330a95845eb85050…

MALICIOUS

PDF

75.1 KB Created: 2021-01-24 19:46:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 97e4980f886ed751f1030d9a9cccbec2 SHA-1: ccac2665b150e370ee8d70c42af6b8a3a9f76c7d SHA-256: 330a95845eb85050cf016d0522b6b8a5849db25f991b20bfb1bfc2d62e990b46
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier strongly indicate maliciousness, likely phishing or malware distribution. No scripts were extracted, but the presence of numerous URLs points to a redirection or download attempt.

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://traffset.ru/123?utm_term=philippine+regulatory+commission+san+fernando PDF link annotation
    • https://cdn.sqhk.co/devisojop/jgjijgK/benulerime.pdfIn PDF document text
    • https://cdn.sqhk.co/gofelaxes/0ricBUO/18033391018.pdfIn PDF document text
    • https://cdn.sqhk.co/salijuvam/4uggibp/muxife.pdfIn PDF document text
    • https://linabodaku.weebly.com/uploads/1/3/1/1/131164293/xosanemuzilaw.pdfIn PDF document text
    • https://cdn.sqhk.co/tisumusef/b81Oiij/hot_wheels_race_off_game_online_play.pdfIn PDF document text
    • https://vinipuzi.weebly.com/uploads/1/3/0/7/130776781/2621493.pdfIn PDF document text
    • https://cdn.sqhk.co/furafurume/hccjhi4/homescapes_game_level_80.pdfIn PDF document text
    • http://swast-group.website/fumisefumuzemewodoxorukeoizoj.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/gjgggfI/40142830094.pdfIn PDF document text
    • https://cdn.sqhk.co/zafazegig/h1ehixx/48653105952.pdfIn PDF document text
    • http://proflist-briansk.ru/expertopup_recharge_programkc18r.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/lijopavexanuse/34429909609.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_off0000e64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64C 5672 bytes
SHA-256: 95626c05a6fa27e72ee16cead3c273783b30de3811a79beafe31817eb6bbbf6e
font_01_sfnt_off0000f978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF978 11524 bytes
SHA-256: 7545ba1177f33b4c8ad4ae5f754b5c9e98c4faa3317685603798401c6bf2b178