Malicious PDF — malware analysis report

Static analysis result for SHA-256 25b3281d9b340d36…

MALICIOUS

PDF

36.4 KB Created: 2021-05-12 08:00:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 462126a7f391c1a5fd0970837a44fd9b SHA-1: 30c91b02f5647518403f03b6d385c833bcb68cfb SHA-256: 25b3281d9b340d36e416802d06ff04d606bc0aa560a69d0121893fc78d7b3b10
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious link disguised as a game hack generator, which is a common lure for phishing or malware distribution. The link points to known malicious redirector infrastructure. While no scripts were extracted, the PDF structure and embedded link strongly suggest an attempt to redirect the user to a malicious site, likely to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0292

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-daily-free-spins-and-coins-2021-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_off0000332a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x332A 24312 bytes
SHA-256: dd5f5cba85cd2ee47a6581078fe539be980aba8230ecd981d61c00a4a316abcb
font_01_sfnt_off00006ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE0 18884 bytes
SHA-256: 183333dfce930995a9382150b407cb528e1a5d3dc22f511d9bca322a4b29e614

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