Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bf1accd49a4b058…

MALICIOUS

PDF

35.9 KB Created: 2021-05-14 15:06:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d4da07a6cb7637b125f50847b2a69003 SHA-1: 0b9c043fb6685f22d5b32815c94a34a3e1e4276e SHA-256: 7bf1accd49a4b058cdfef40efd07be3cb9617748ae570275fada5533e1e9d2ca
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting a 'game hack generator'. The document body text and heuristic firings confirm the lure is related to game hacking and includes a call-to-action to download or access the generator. The embedded URL is the primary indicator of malicious intent, likely leading to a further stage of compromise.

Machine Learning

  • Nyx PDF Classifier clean score 0.0282

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-hack-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_off00003656.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3656 23836 bytes
SHA-256: 5d7beabb873f1e5535d5bef7a0facd4f7c3c26edeb773bf35b4a5d7323d2de88
font_01_sfnt_off00006c38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C38 17880 bytes
SHA-256: 811ddb8557bc0f5be85009fa6d5ae0baa2b7fc09c58d91c5790597872cecd122

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