Malicious PDF — malware analysis report

Static analysis result for SHA-256 8772aa9c9a042846…

MALICIOUS

PDF

34.4 KB Created: 2021-06-19 20:29:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 696d9ac3620c503ea6ceef30899b73ea SHA-1: 646e215661acf28161b008c40f43c6fe79742c9c SHA-256: 8772aa9c9a042846e4a6730e7aacf36ef034327ccd2244af7411b8360218804a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically advertising 'Pro Hacks Roblox'. The embedded URL directs to known malicious infrastructure, likely serving as a lure for users seeking game cheats. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the document's intent is to redirect users to a potentially harmful site.

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/pro-hacks-roblox-game-hack In PDF document text
    • https://library.uigm.ac.id/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/get-free-roblox-private-servers_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-how-to-get-free-stylish-animation_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-accounts-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/schoto-roblox-free-shop-hair_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-windows-10-edition-unpatched-cheat-engine_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-skin-strucid-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/www-coinmaster-com_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-hacks-for-bloxburg_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-cheats-for-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f0c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F0C 22876 bytes
SHA-256: f74ce755ecc89714ec3068af83c6e9d8070690feaee0ffa1501b1cb4017f64ce
font_01_sfnt_off0000623b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623B 18808 bytes
SHA-256: 9c6a838e803f72538157a16cc067217a428d863be91c5b8806a0d88ad87a3ebd

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