Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb916c7c98edaad1…

MALICIOUS

PDF

38.8 KB Created: 2021-05-16 06:30:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 67ff89fd8a1bea953becab3cc6b23fa4 SHA-1: f48ee83395f4a7f30f9fd0ebd78b2219372ae75c SHA-256: bb916c7c98edaad11fda84536945ec871e48618d82f0b2df8a367ae28034359e
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious link disguised as a 'game hack generator' lure, which is a common social engineering tactic. The embedded URL points to a known malicious redirector, suggesting the document is designed to lead the user to download further malicious content. No scripts were extracted, but the heuristic firings strongly indicate a phishing or malware distribution attempt.

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/431946152/how-do-you-get-robux-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_off000032ce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32CE 24552 bytes
SHA-256: e5a54aac0a582efddaab26776e7733aaa6c638d46575a0ccb16ca7b0c73f0c8b
font_01_sfnt_off00006af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF3 2940 bytes
SHA-256: 1aee4d159e3b61256beedc8205a8b199ec15803bbaeb914c34c87d0ab9e94ba1
font_02_sfnt_off00007526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7526 18448 bytes
SHA-256: d9f15c8d06a9f68edc08429574edcd345d0edfc323a0421ca163819fb1e2672f

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