Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a9850dff91c1598…

MALICIOUS

PDF

36.2 KB Created: 2021-07-01 21:57:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e376ac72d5cdf2e60e876d1eec6eed98 SHA-1: 0f116de2812f6bd26e2cac043e6a1d0e13972a7d SHA-256: 5a9850dff91c1598a0976c4d5919d42509e10ce6f38106698f72f5bbad4702d1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a lure for game hacks, specifically mentioning Roblox, and links to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though partially garbled, contains the same lure and URL, reinforcing the phishing attempt. No scripts were extracted, but the primary attack vector appears to be a social engineering lure leading to a malicious URL.

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.co/app/431946152/how-hack-in-roblox-with-bad-words-game-hack In PDF document text
    • http://library.itekes-bali.ac.id/repository/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-hack-money-in-heists-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/hack-de-robux-2021-100-real_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/cheat-engine-god-mode-script-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-hack-menu-download-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-here_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/auto-jump-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-hack-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-hacks-to-get-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-coins-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-cards-link-2021_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
font_00_sfnt_off00003361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3361 22968 bytes
SHA-256: d8aa6d043d84d6dccddf07d366aa601a97e54e46e95d2859698e7a406e2d04c0
font_01_sfnt_off000066c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C5 19584 bytes
SHA-256: d2c023b96386bfe9f9c5bf59402d031a766630eb0db5a3bd6ee21337cab83ea2

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