Malicious PDF — malware analysis report

Static analysis result for SHA-256 198f2d8cbbfdbd18…

MALICIOUS

PDF

32.6 KB Created: 2021-06-11 09:54:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: fdc37a46b1f7fcd9e009f529741d007a SHA-1: 8e2eb282d3d1f4bfbafafeaf5ca6e325781fa3ac SHA-256: 198f2d8cbbfdbd18cc9b525fba75419c003d243739d7f0f4026ee21d5f0cd972
130 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to a known malicious domain, masquerading as a game hack generator. The document body explicitly mentions 'Roblox Hack Apk Download' and 'CLICK HERE TO ACCESS ROBLOX GENERATOR', reinforcing the lure. The presence of embedded URLs and the nature of the lure strongly suggest a phishing attempt to trick users into visiting malicious sites, likely to download malware or engage in further credential harvesting.

Machine Learning

  • Nyx PDF Classifier clean score 0.0622

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.tw/app/431946152/roblox-hack-apk-download-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
font_00_sfnt_off0000251a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x251A 25072 bytes
SHA-256: be5011826c9c87f11280747b47d9f22b0ef23f729cad47664ea07c919e81a4a1
font_01_sfnt_off00005ea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA6 18112 bytes
SHA-256: c4a6b443f3e3c0d6788ff2d488f511a05cb3cc20adc98c8b707c43a0f6e7187d

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