Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fda14d0a9d1aaf6…

MALICIOUS

PDF

33.1 KB Created: 2021-07-19 02:11:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d011f511399a002cf3a6b9094ccea943 SHA-1: 1fa48848e1ac021f2100a4b6f76e25ea93c63fea SHA-256: 3fda14d0a9d1aaf6d9dca114f191d7581b2971188b4e07d8378a57d34820c03b
160 Risk Score

Malware Insights

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

The PDF contains multiple links that redirect to malicious infrastructure, masquerading as "Robux Hack Tools" or "game hack" generators. The ML classifier also flagged this PDF as malicious. The embedded links likely serve to download and execute a second-stage payload, a common tactic for initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9224

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 http://netcdn.tw/app/431946152/robux-hack-tools-game-hack In PDF document text
    • http://dorfgaragethalwil.ch/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://dorfgaragethalwil.ch/images/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://dorfgaragethalwil.ch/images/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://dorfgaragethalwil.ch/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://dorfgaragethalwil.ch/images/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://dorfgaragethalwil.ch/images/free-robux-app_GM431946152.pdfIn PDF document text
    • http://dorfgaragethalwil.ch/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/my/tasksIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B37 22884 bytes
SHA-256: 949bb3eeb9546311d9b7a368d1c1ed5b9384255b29e1e79ae5836b16dd16cd46
font_01_sfnt_off00005ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC3 18508 bytes
SHA-256: 94255c3edb8822584fac28ab17ddba486c217fd71b943d7545d5a8e460f20fbb

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