Malicious PDF — malware analysis report

Static analysis result for SHA-256 b298b7a6245ee41d…

MALICIOUS

PDF

35.1 KB Created: 2021-07-08 16:07:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1c7d1bd0339e07d59c667160ad139488 SHA-1: a9813eaaf75774ec17518bfd8af97a92ce6cf008 SHA-256: b298b7a6245ee41d4ac4c1b49ab5632b46650b838f77ff5e935927cbfcb51a74
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, likely serving as a gateway to further malicious content or downloads. The document body contains numerous URLs related to game cheats and exploits, reinforcing the deceptive nature of the lure.

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/mcpe-master-hack-unlimited-coins-apk-game-hack In PDF document text
    • http://digilib.stiki.ac.id/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/can-u-get-roblox-on-ps4-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/can-roblox-accounts-be-hacked_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-ban-people-on-roblox-without-cheat-engine-commands_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-free-robux-without-email_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/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-facilement-et-gratuit-sur-android_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-change-your-chat-colour-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-tix-generator_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/the-conquerors-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-generator-no-survey-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-robux-hack-using-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-roblox-hacker-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-promo-codes-2021-not-expired-november_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-35-16-hack-apk_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_off000030b4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30B4 23068 bytes
SHA-256: 18a61e8d01a2a6e8ebf5016a36b4ff2a80b2d386bcaa7ba86e7a28716f07a28f
font_01_sfnt_off000064a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A5 18876 bytes
SHA-256: cff328fbfbb016d0dce3cf851f5e410737f9aed8bc79c14d42fa2678cdcae346

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