Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d4aa7808ca7695…

MALICIOUS

PDF

34.9 KB Created: 2021-06-21 22:50:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 8ec4032a35890691b5726f572e7305c4 SHA-1: 77bd2890fc36d87ebdb79101e9d29999ed673f2b SHA-256: 54d4aa7808ca769592597af282e08062d578975af8e96a46a8bf274be8417fed
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links to websites offering game hacks and cheats, identified by heuristics as malicious redirectors. The document body explicitly mentions downloading hacks for games like Roblox, indicating a lure to potentially malicious content. The presence of numerous embedded URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/como-descargar-local-player-hacks-roblox-game-hack In PDF document text
    • http://linens.kiev.ua/images/roblox-hack-for-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/roblox-prison-life-free-game_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/admin-hack-roblox-download_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/code-pin-free-roblox_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/roblox-mobile-hacks-4-free-robux_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-fe-roblox-script_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/how-to-hack-roblox-cheat-engine-65_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/hack-script-download-for-roblox_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/cupcake-hack-roblox_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/roblox-shard-seekers-hack_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/roblox-free-online-no-sign-up-or-download_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/robux-hack-wiki_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/roblox-free-suit-not-deflaut_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off000031b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B3 21996 bytes
SHA-256: c2863ce47a6946e1cb619b9e41de3d5cea72155f4370a660b5f14161bb745544
font_01_sfnt_off0000621d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621D 19420 bytes
SHA-256: ff99a02db190803b25d4bb0379c0de8471b5c3adef4c1d79936b043dfacdb0ea