Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac00ef6f9f2af0c…

MALICIOUS

PDF

32.8 KB Created: 2021-07-05 08:32:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8a02bd44ede905601b603c455aee93ec SHA-1: 4ab2c973318365c8c631b96b8c2ce5d99b12110a SHA-256: 1ac00ef6f9f2af0cba198769af1fa4b9240ab48d44061ec9a72f840fd2b2d259
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting game hacks and cheats. The primary lure appears to be related to 'Coin Master' and 'Robux' hacks. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

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/fb-coin-master-game-hack In PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-playstation-4-free_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-robux-no-anything_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-dragon-ball-z-final-stand-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-hacks-to-get-spins_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/hack-de-free-drive-roblox-tarjetas_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/dantdm-code-free-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-roblox-game-card-codes_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-join-someones-game-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-roblox-intros_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_off00002d2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D2E 21980 bytes
SHA-256: 60ee2b061cd2896ab5dbe0c2b28573523ccc613d2affd46447ce74fa37c34bd1
font_01_sfnt_off00005da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA0 18156 bytes
SHA-256: 7a3cd79ff080fa27ccf3189e4d913bb82dfe371fff983502a27164cba1261ff5

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