Malicious PDF — malware analysis report

Static analysis result for SHA-256 13e921b064608654…

MALICIOUS

PDF

44.6 KB Created: 2021-04-28 15:44:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c1d821f3b2c978d57ebe4746136967b5 SHA-1: 2f8ca48fe7128bf24331af5a7ae41c2ac199d97e SHA-256: 13e921b064608654eaa65325785f0514e587ab9ae661d78073c3046a2179bc13
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links that redirect to a known malicious domain, masquerading as a game hack generator. The document body and embedded link targets suggest a social engineering lure to trick users into visiting the malicious site. No scripts were extracted, but the presence of malicious redirector links is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.0242

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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
  • 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://netcdn.xyz/app/431946152/no-virus-hack-roblox-game-hack In PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/free-roblox-accounts-with-robux-list.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000035f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35F8 26400 bytes
SHA-256: 793d13063ce87d6dfa876cafafbc3c01773ec2ae0ffd1840b2248e5377b13952
font_01_sfnt_off0000712d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x712D 11440 bytes
SHA-256: 154d59d1680f2d1e38ccb783d6997f344290d121007e51df331726de4128c12e
font_02_sfnt_off00008c4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C4E 18576 bytes
SHA-256: 19b93f7573c765038a7c64e132a20bb5c897a26630bcbfc6170d3d6ff45c0ce9

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