Malicious PDF — malware analysis report

Static analysis result for SHA-256 717f58211f5e541e…

MALICIOUS

PDF

35.0 KB Created: 2021-06-20 19:44:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0a22131501de0dc3d9594c550fc82ad1 SHA-1: cea1d179623630ba6314713916a2f53667e6e851 SHA-256: 717f58211f5e541e318b11b8451dd1327b99d65a39854ff09bf11b8c60e783a6
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to websites offering game hacks and free currency, with a primary link pointing to a known malicious redirector. The document body and heuristics indicate a lure for game-related cheats, likely intended to lead users to malicious sites or download further malware. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/roblox-mod-apk-2021-free-robux-game-hack In PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/coin-master-hack-app-ios_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-roblox-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/my-account-keeps-getting-hacked-on-roblox-what-to-do_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/coin-master-free-spins-link-31-march-2021_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/gameoffice-net-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/como-tener-robux-gratis-sin-hacks-2021_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/how-do-i-get-free-robux-in-rolblox-2021_GM431946152.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_off00003017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3017 22188 bytes
SHA-256: 3c97af60c8409c45ed3c9b1ccb37834da40b9ee137097688b4f654edbf0e1dcf
font_01_sfnt_off00006127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6127 19908 bytes
SHA-256: b18683e0b709a65b50457fa0928224bf0b64d6edfaf044f58e68c749a21c4bff