Malicious PDF — malware analysis report

Static analysis result for SHA-256 be9a27b3dfaebf39…

MALICIOUS

PDF

37.6 KB Created: 2021-05-12 15:02:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 678778355d9089ea8047d384f289c88f SHA-1: e91b9b7beffb12d1545d48a1a8f910dbe9a3a690 SHA-256: be9a27b3dfaebf391ea2c7007fc502cb5e4dbd2611ea94936375741598c445c8
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a lure for a 'game hack' generator, directing users to a known malicious redirector URL. This indicates a phishing or scam attempt designed to trick users into visiting malicious sites. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.0130

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/install-coin-master-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_off0000321b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x321B 24616 bytes
SHA-256: e71e5940f533689993a6b9ba5806d1adc6179beaa02c96a04def5fe6d0f69100
font_01_sfnt_off00006966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6966 2884 bytes
SHA-256: 4d5450ce7e6d7db995ea7e6ffcd90efeba3e66825e548aa429b230fb003c0574
font_02_sfnt_off00007348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7348 17620 bytes
SHA-256: bdd3f6fa08a68690a33effe7c91399080072412a80d1c2cf12d0a6868a7ffe9a

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