Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0947f34279c9d2f…

MALICIOUS

PDF

81.8 KB Created: 2020-11-19 21:40:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a2d4935cfbf6a32ffb4bfb83c196ee0 SHA-1: 1237b8a64fda58a5b4cedc26d0979bd8f8040104 SHA-256: a0947f34279c9d2fb3f9fa34fa2776e12676db9508b00d9454bc175d19e1a96c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a site masquerading as an "Indian bug bounty platform." This suggests a phishing or social engineering attempt to direct users to a malicious domain. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to download a second-stage payload or redirect to a phishing page.

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://trafffi.ru/strik?utm_term=indian+bug+bounty+platform
    • https://cdn-cms.f-static.net/uploads/4447487/normal_5fa9d3a8e1030.pdf
    • https://refaxezadale.weebly.com/uploads/1/3/4/3/134325555/33c50fc.pdf
    • https://cdn-cms.f-static.net/uploads/4415935/normal_5f9a79b0e1b22.pdf
    • https://cdn-cms.f-static.net/uploads/4413235/normal_5f9e4fa048f88.pdf
    • https://cdn-cms.f-static.net/uploads/4383917/normal_5f8bd94d3e8ae.pdf
    • https://lifesodoxeduze.weebly.com/uploads/1/3/4/3/134372712/9589863.pdf
    • https://cdn-cms.f-static.net/uploads/4383913/normal_5f92807c41466.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jezobasit/47296397524.pdf
    • https://s3.amazonaws.com/ritoma/teoria_de_bandas_en_solidos.pdf
    • https://s3.amazonaws.com/vexosafugunu/vernacular_in_english_literature_examples.pdf
    • https://s3.amazonaws.com/mejawiwomak/romance_da_raposa_aquilino_ribeiro.pdf
    • https://s3.amazonaws.com/poresi/images_of_things_that_start_with_the_letter_p.pdf
    • https://s3.amazonaws.com/bulolimepol/11319267931.pdf
    • https://s3.amazonaws.com/fedojigudaj/plot_of_homeless_bird.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecb5.bin
2014c006118c4480392d82984491bd640b35edbc45557c996a2d4e9d58da17ff
pdf-font-stream PDF embedded font (sfnt) at offset 0xECB5 5364 bytes
font_01_sfnt_off0000fee6.bin
455b09911b6d61234c858af9742b0cf8692d83c31eabd9af36274638a0ac7332
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE6 11036 bytes
font_02_sfnt_off000124e7.bin
4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349
pdf-font-stream PDF embedded font (sfnt) at offset 0x124E7 16164 bytes