Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a46ebf1713a1c68…

MALICIOUS

PDF

35.3 KB Created: 2021-07-07 12:45:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 77aef4b26ad5b99005b606ef7450b8a2 SHA-1: bce86562601c1ecd17b84eabf4777ee2268f3b3b SHA-256: 4a46ebf1713a1c685ab9d010cfceb138af909033bd4686a4ac178cf2236c0d01
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting game hacks and cheats. The heuristic firings indicate that the PDF is designed as a lure, directing users to a known malicious redirector. While no scripts were explicitly extracted, the nature of the embedded links and the lure suggests a potential for further malicious activity, such as downloading additional payloads.

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.tw/app/406889139/game-hunters-coin-master-game-hack In PDF document text
    • https://razredna-nastava.net/files/roblox-hack-bee-swarm-simulator-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-kill-aura_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/robux-premium_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/cardcodepw-free-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-hacks-for-star-wars-awakening_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-hack-roblox-catalog-2021_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/robux-apk_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-cute-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-things-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-urbis-hack_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-admin-hack-scropt_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-spins-link-deutsch-ios_GM406889139.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
stream_002_off000034cf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34CF 22720 bytes
SHA-256: c027b6bfe38cffb1930e6fe0f63789a8538b61720a9994ebd69bc656c6dbbb5c
font_01_sfnt_off00006780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6780 18236 bytes
SHA-256: 1c9276275f01b8ee8a35d94754bfc2cd49d6bf50d60c60048a77e6e66c35f9e8

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