Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3cc3ef3fb32abe7…

MALICIOUS

PDF

71.8 KB Created: 2021-01-09 02:50:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 02c23d8bde23a355751cabd15c2d295c SHA-1: aee3965d7209f8a056825202ef434304f38be056 SHA-256: e3cc3ef3fb32abe7d6cfcd1826034096c96a9e880163552242ab86af279e1d6e
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is also flagged by ML classifiers and ClamAV. The document body, though heavily obfuscated, suggests a lure related to game mods, and the presence of embedded URLs further supports a phishing or malware distribution attempt. The primary technique observed is the use of a malicious link within a document, likely intended to trick the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffmen.ru/wb?keyword=walking%20war%20robots%20unlimited%20gold%20mod%20apk In PDF document text
    • https://cdn.sqhk.co/naliwanik/ihghgd1/top_20_bollywood_songs_2019_audio.pdfIn PDF document text
    • https://cdn.sqhk.co/puwukuwos/jTibxjb/apprentice_electrician_jobs_ireland.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489724/normal_5ff89ace752d1.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/agj2ghc/29216923427.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366369/normal_5fec6edfd7956.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492901/normal_5fe2514b26e09.pdfIn PDF document text
    • https://cdn.sqhk.co/bafesugoguwi/W5V1mFp/runescape_halloween_2020_eve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463266/normal_5fe7f29a163ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412895/normal_5fc2403c68d18.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477139/normal_5fe450932be28.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f59c309-2969-4e5a-90c8-63674b0131a5/pathfinder_anti_paladin_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62cd77d0-defd-4ec6-ba4e-79261cf4069e/order_of_voluntary_disqualification.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_off0000da9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9A 5588 bytes
SHA-256: 15767481a64a2c63b84bcab85f29f790a28912c3ad095fd07aff85890d52da7d
font_01_sfnt_off0000ed96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED96 10888 bytes
SHA-256: d4f700555451a3fd4f6ad927e660c186cab178256febeeef00b0af46ba50ece3

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