Malicious PDF — malware analysis report

Static analysis result for SHA-256 047531998a686360…

MALICIOUS

PDF

31.2 KB Created: 2021-07-21 05:32:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: baba765d139287dac4cc3a7afaf1e7c8 SHA-1: bc902202c6e6d096ce198352f86e44c7ca3a022a SHA-256: 047531998a686360a20417d9aeba5b3ad5bc8c72b864acd952ad2a7ee6165a68
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a known malicious redirector, leading to a "free generator / game hack" lure. The document body reinforces this by displaying a call to action for a TikTok generator. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect the user to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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/835599320/free-likes-for-tiktok-game-hack In PDF document text
    • https://gryps.de/images/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://gryps.de/images/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • https://gryps.de/images/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
    • https://gryps.de/images/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn 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_off000027c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27C6 22588 bytes
SHA-256: 0bf346bccbf4b179011561a3fa93d26f5877a16d36d6372cda7c2b66e033eee9
font_01_sfnt_off00005a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A23 17456 bytes
SHA-256: 308920fe04ba02bee84e9df39862d70534e91875b9399095fdfb0b81d81483e5