Malicious PDF — malware analysis report

Static analysis result for SHA-256 9302a32adbd62b86…

MALICIOUS

PDF

68.0 KB Created: 2020-11-22 05:17:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b40d47eb51903477cf300b2879d4e66d SHA-1: 1ecf5def9b4371878eae26418b73fddf0bb30ac6 SHA-256: 9302a32adbd62b8610836578f3b57d81547d2b9130ffe44eb4195c123baddecb
156 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and heuristics indicate it is part of a link farm, specifically designed to redirect users to external PDF documents. The primary malicious URL identified is 'https://traffnew.ru/aws?utm_term=call+of+duty+legends+android+release+date', which appears to be a lure. The presence of multiple external PDF links suggests an attempt to distribute further malicious content or engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/aws?utm_term=call+of+duty+legends+android+release+date
    • https://wenadowepafim.weebly.com/uploads/1/3/4/3/134314247/8cdb0ef3eaa35d.pdf
    • https://vagonegasix.weebly.com/uploads/1/3/1/4/131482995/bd0cb1a54.pdf
    • https://cdn-cms.f-static.net/uploads/4371814/normal_5f9d90bf52908.pdf
    • https://morozosewiveloz.weebly.com/uploads/1/3/4/3/134387595/e6bbb.pdf
    • https://cdn-cms.f-static.net/uploads/4473622/normal_5fa8c8b25a796.pdf
    • https://rofofomigedug.weebly.com/uploads/1/3/4/4/134486696/3671448.pdf
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/mojuni.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bulalowisu/74582495330.pdf
    • https://s3.amazonaws.com/zirojopemup/vofiluriwixor.pdf
    • https://uploads.strikinglycdn.com/files/d6981192-3173-4ae0-90c8-ad76380463da/nijusixoweve.pdf
    • https://uploads.strikinglycdn.com/files/2af735a5-095a-4d11-b5fe-878a406eae74/torrent_download_net.pdf
    • https://s3.amazonaws.com/sojuravewi/modern_combat_4_apk_zip.pdf
    • https://s3.amazonaws.com/dutuzanob/222_day_brain_teaser_answer.pdf
    • https://s3.amazonaws.com/jinabisura/scatter_plot_worksheets_with_answer_key.pdf
    • https://s3.amazonaws.com/jesidofefe/biwapojudatixazaban.pdf
    • https://s3.amazonaws.com/susopuzupure/92398541101.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_off0000cba9.bin
dd81f930af46731988cd44ad424b1e2f0d7eed243d25c11c15ee9e95becec070
pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA9 5080 bytes
font_01_sfnt_off0000dd09.bin
41d42500b0c9d2b44d1874bcffa3744fa552a3714b52ebf1cbcf2e98a0669fbf
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD09 11116 bytes