Malicious PDF — malware analysis report

Static analysis result for SHA-256 d73eb3a5a67044da…

MALICIOUS

PDF

74.7 KB Created: 2020-12-29 19:03:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 793263b332a37a8b89bd578dd6615109 SHA-1: 1f088840f54966dbe1fc9ee90277f8983d0f35e8 SHA-256: d73eb3a5a67044dacf6d39d5525b267e776aa95160f41d176b6621447b0a4fcd
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 'traffnew.ru'. This, combined with a ClamAV detection of 'Pdf.Phishing.Trojan', strongly suggests a phishing or malicious redirection attempt. The presence of embedded links and the ML classifier's high confidence score indicate the document is designed to lead users to harmful content.

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=nursery+rhymes+for+babies+baby+shark
    • https://static.s123-cdn-static.com/uploads/4412774/normal_5fe39ecde6045.pdf
    • https://roneresikixa.weebly.com/uploads/1/3/4/4/134476702/7665957.pdf
    • https://cdn-cms.f-static.net/uploads/4488102/normal_5fbf22bca297e.pdf
    • https://cdn-cms.f-static.net/uploads/4369491/normal_5f9a8ee64d5c0.pdf
    • https://cdn-cms.f-static.net/uploads/4373526/normal_5f8bef1225c0a.pdf
    • https://cdn-cms.f-static.net/uploads/4446283/normal_5fc0e8940dd5a.pdf
    • https://static.s123-cdn-static.com/uploads/4366654/normal_5fcd31994746f.pdf
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f889b9698ede.pdf
    • https://cdn-cms.f-static.net/uploads/4408001/normal_5fb2cace96039.pdf
    • https://cdn-cms.f-static.net/uploads/4369671/normal_5fa1ec251c287.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/midipes/amazing_games_for_pc.pdf
    • https://uploads.strikinglycdn.com/files/d4fdc445-f858-4302-8ebc-3a45186ce8fc/budget_bytes_tofu.pdf
    • https://s3.amazonaws.com/setaxilitozuko/moultrie_m80_game_camera_manual.pdf
    • https://uploads.strikinglycdn.com/files/e350dc5b-de46-409c-bf2a-2c0063de7a26/liribiforij.pdf
    • https://s3.amazonaws.com/sosupejuxofedo/bapovoweb.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_off0000e59c.bin
8d13dbda37e2b95401ebb8edfaf4968f6179fbb0d0ea1812eff8437f3f1a8344
pdf-font-stream PDF embedded font (sfnt) at offset 0xE59C 5248 bytes
font_01_sfnt_off0000f758.bin
3a5fa0e3e436a779b19c354031510b422e61f959fc0f8bd270e31dcf9b4d9db4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF758 11512 bytes