Malicious PDF — malware analysis report

Static analysis result for SHA-256 db5966240bd87df1…

MALICIOUS

PDF

66.7 KB Created: 2020-11-20 08:36:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56cc3bf59efb99d4dc794baca7a40c1a SHA-1: 128abfbc82939b206fcb6f099a2d38d547cdbd53 SHA-256: db5966240bd87df18733f5a60b35ba95a3cdfd8cf450e75a04755977dfafcee0
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm and has been flagged as malicious by ML classifiers and ClamAV. The embedded URL, 'https://traffnew.ru/aws?utm_term=bollywood+movies+2007+hd', is likely used to redirect users to a malicious site. The document body, though heavily obfuscated, contains keywords related to Bollywood movies, suggesting a lure to attract victims.

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-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/aws?utm_term=bollywood+movies+2007+hd
    • https://cdn-cms.f-static.net/uploads/4371261/normal_5f8bbc2b4bb8a.pdf
    • https://dutigopomifit.weebly.com/uploads/1/3/4/6/134611267/378f65288.pdf
    • https://kunisalopug.weebly.com/uploads/1/3/4/3/134315348/413600.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c1aafc61-b5cf-4ecd-aa9c-29f63b944093/jadeg.pdf
    • https://uploads.strikinglycdn.com/files/dfe96427-b0e0-46bf-9971-a49dc92ce3a0/fimumukupupegosig.pdf
    • https://uploads.strikinglycdn.com/files/65320ac3-e54b-4222-9097-efeda5d77c8d/8853971866.pdf
    • https://uploads.strikinglycdn.com/files/26c5f5ce-766b-4cc1-9bf3-552294ea745d/michelle_alexander_the_new_jim_crow_citation.pdf
    • https://uploads.strikinglycdn.com/files/f501ea42-ff31-4bc9-b545-6fafd1be8039/2262319804.pdf
    • https://uploads.strikinglycdn.com/files/a06a41b3-492e-4303-bd24-7d012c406f50/86121739693.pdf
    • https://uploads.strikinglycdn.com/files/dba1b706-33d7-43ae-a910-dcd226003e95/allegro_pcb_si_sigxplorer_user_guide.pdf
    • https://uploads.strikinglycdn.com/files/e804517d-c35e-4bef-8ab4-06ce9c831d30/64010966969.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_off0000c8ef.bin
9a19713a79db65a557ed9f79b113848a38c9349b47bb871b10b8c44c8e737c48
pdf-font-stream PDF embedded font (sfnt) at offset 0xC8EF 5416 bytes
font_01_sfnt_off0000db63.bin
95dac3a099c8bd3b1b4cfe8ccdfd6fa546aa2a13b3ba14b32a13813e1e826726
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB63 10388 bytes