Malicious PDF — malware analysis report

Static analysis result for SHA-256 a17ee75810b91866…

MALICIOUS

PDF

37.1 KB Created: 2021-05-11 09:05:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4e44514e1c2e584a01e28a9a44a1008d SHA-1: 77ddbb8cc7d267c97cdae99e4116928f7aeee8ff SHA-256: a17ee75810b91866c82246725f918f76d3d2d70c8b5d3208df00855247575847
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to a known malicious infrastructure, specifically advertising a 'game hack' or 'generator'. The document body text and embedded artifacts reinforce this lure by mentioning 'Robux' and 'generator'. The primary heuristic firings indicate a malicious redirector and a lure for game hacks, strongly suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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-i-earn-robux-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_off00003223.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3223 27120 bytes
SHA-256: ca0d734e18a8707b6d2bd65e899ed4b57b45d9ba46c72e145828d45155a108cc
font_01_sfnt_off00006f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F09 18408 bytes
SHA-256: 350582f1d58d1735b3ef44c6ea1125d20f3e73fdc3e97f575fa3cd3422386c7e

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