Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c9f5e58f364af4d…

MALICIOUS

PDF

35.3 KB Created: 2021-05-10 12:06:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 857dae13e91a86959fbe476d2059d9b1 SHA-1: 294ade4533099e78288a9519404cfd537736c953 SHA-256: 5c9f5e58f364af4d8f4e0eff3299bbb72d7bf503a92dd79f6d4589fff040a29c
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a known malicious infrastructure, specifically promoting a 'game hack generator'. The document body and heuristics indicate a lure to a website that likely hosts further malicious content or exploits. No scripts were extracted, but the primary function appears to be directing users to a malicious URL.

Machine Learning

  • Nyx PDF Classifier clean score 0.0306

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/406889139/how-to-get-free-cards-on-coin-master-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003219.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3219 24216 bytes
SHA-256: 2861a35f577af82993000bd316f11c299df55e0080df9ed7c0d59e86ae28bf39
font_01_sfnt_off00006957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6957 18048 bytes
SHA-256: bfb64ce9e7d02389d71d7e4e9bdd975b312ee1bb88589b15dc2c17ff59354668

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