Malicious PDF — malware analysis report

Static analysis result for SHA-256 44f4c4844ea57007…

MALICIOUS

PDF

35.5 KB Created: 2021-07-08 00:43:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f16e3f6d487bf96bcf08ab63c1b8a2ea SHA-1: a339379dd342204bce8dcf5876e67b2ee0ac1c05 SHA-256: 44f4c4844ea570079df84a4330a2cb4bd54bf2672d4b04f70cf38a053e5c1df5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of "game hacks" and "free generators" to entice users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or phishing pages. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious workflow designed to exploit user interest in free in-game items or cheats.

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/coin-master-hack-extension-game-hack In PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/free-spins-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/roblox-apocalypse-rising-get-hardocre-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/coin-master-hack-no-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/hacking-my-brothers-roblox-acaawaant_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/roblox-ultimate-driving-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/pokemon-go-free-808_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/earn-5-robux-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/how-to-get-free-robux-by-using-cookies_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/cheat-roblox-lifting-simulator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/how-to-hack-roblox-with-its-source_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/comande-de-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/i-am-gonna-hack-your-roblox-account_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_002_off000034b8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34B8 23040 bytes
SHA-256: 2cd468e387c88df9caa714bb0346e160514948bf5cef0b6b6d76bfeb2d3556b1
font_01_sfnt_off0000687b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x687B 18216 bytes
SHA-256: 2931dff1aa1ed3e5abaa74da1b228119697b7db9f330ff004e5f50cd24bc59fb

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