Malicious PDF — malware analysis report

Static analysis result for SHA-256 f08dec5787bfdf63…

MALICIOUS

PDF

39.0 KB Created: 2021-05-12 23:40:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f69c23666866bb56b983ebbd496aaf1e SHA-1: 906c18f43851576a204edfb85321fa12d148475a SHA-256: f08dec5787bfdf630374e983a944e647931fbe8e9f2e11dbc4f1aece1b53d7ec
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains heuristics indicating it's a lure for a game hack generator, linking to known malicious redirector infrastructure. The document body and embedded artifacts suggest a social engineering attempt to trick users into clicking the malicious link, likely to download a secondary payload or lead them to a phishing site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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/coin-master-free-coins-and-spins-hack-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003571.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3571 25076 bytes
SHA-256: 6aeeefe343d241b0d32bb0e51fe21ecdac6d34038dd500ae2b4e3bb6e816c275
font_01_sfnt_off00006da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA1 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off00007744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7744 18228 bytes
SHA-256: 354d04eea8306255969a9ffde93a2dc9fe516d06f825e89064d5817ccb1fcce8

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