Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b41c13de20e0f2e…

MALICIOUS

PDF

35.7 KB Created: 2021-07-05 14:48:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: dc268ae6b3784fadaa88a4f9254f72a3 SHA-1: fce9414dbae43e41f1436b996f800791edf91c67 SHA-256: 1b41c13de20e0f2e2cd5faabfdff4cc6226c11fc43a2f2184a3da5c159a62a01
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirector lure, pointing to malicious infrastructure. The document body and embedded URLs reinforce this by advertising cheats and generators for popular games. Although no scripts were extracted, the primary attack pattern involves tricking the user into visiting a malicious URL, likely to download further malware or engage in phishing.

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/431946152/roblox-treasure-hunt-simulator-202120219-cheat-game-hack In PDF document text
    • http://library.itekes-bali.ac.id/repository/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-no-hacking-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-natural-disaster-survival-how-to-get-free-balloon_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/dragon-ball-z-roblox-training-hack_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-money-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/can-you-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-group-with-free-group-refund-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/irobux-fun-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/cheats-for-dragon-ball-rage-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-with-no-human-verification_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_off000031fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31FE 22556 bytes
SHA-256: 744d2c40c1fdbed03a1a1d9978f7ab247f173862d3ebbb0e004f8acb6f41d790
font_01_sfnt_off00006424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6424 19844 bytes
SHA-256: 582b5b36b9234a809028e5775aaeae5cf4999d9758fb376396c1a2127837980b

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