Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee1677d72b788bd…

MALICIOUS

PDF

36.2 KB Created: 2021-07-08 05:35:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 70e996fb0b666f3c5982c0990a16080c SHA-1: 3a5807b970c2339959bfcb69840882f4e383dff0 SHA-256: dee1677d72b788bdc60f7f61fc21cce1ffe74b2be14bd1f5970a46ebe0f979e2
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 redirector identified as malicious. The document body and embedded links strongly suggest a lure for users seeking cheats for games like Coin Master and Roblox. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to redirect users to potentially harmful sites, likely for phishing or malware distribution.

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.tw/app/406889139/coin-master-hack-version-download-ios-game-hack In PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-cheat-in-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-now-com_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-youtube-how-to-play-bloxburg-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/getrobux-info_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/download-free-robux-giver-for-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-shirt-for-kids-free-shipping_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-hack-roblox-carlos-admin-house_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-spins-iphone-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/hacking-simulator-mobile-update-codes-roblox_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_off0000359a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x359A 23048 bytes
SHA-256: b9441b153c5720b45025ea7575e26840f95a05ab5af78511527c7ec572edaf5f
font_01_sfnt_off00006953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6953 18720 bytes
SHA-256: 3c4367012d12327575ededa4d77ef98d6970aefe65cc86cc308957458729a9ee

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