Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ccfd8a4e68a840…

MALICIOUS

PDF

44.5 KB Created: 2021-06-11 10:10:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 48f53e1d5381f6e9007066cf7b678c2f SHA-1: 0bebdaa7d9d69145b6bb6ec0175115fcc7bb78ee SHA-256: 37ccfd8a4e68a84051e03b30ff0416c7baf3c28d7de02dee0a1754fba6c2042d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a lure for free Robux and game hacks, directing users to a known malicious redirector. The document body and embedded URLs strongly suggest a social engineering tactic to drive traffic to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious redirector chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/robux-hacks-admin-commands-game-hack In PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/village-4-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/robux-online_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/easy-hack-to-get-robux-and-not-long_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-ios_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox40com-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-hack-download-android-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-teethyz-dentist-how-to-get-free-points_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/cute-free-roblox-clothes_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
stream_004_off0000504f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x504F 25544 bytes
SHA-256: 991ac63c0b29e8ccd9ba709cf0e46aee8b71f6e64196fec3abf977d5ed0da834
font_01_sfnt_off00008996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8996 18800 bytes
SHA-256: 0bb897cc558a55afa91c2dc60ab5d2ce6cf8e7715c2317c2d925ed3019c979f6

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