Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ee17a24c2f2cef7…

MALICIOUS

PDF

46.6 KB Created: 2021-06-04 02:42:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ff326fc6f725d810c97bdf4dc1b5cc91 SHA-1: 929cdc6bea22099ea762da20376cf5cb79591427 SHA-256: 3ee17a24c2f2cef7e4ddcf8870f16362efffc223b0332c0c87bbaf8349747a2d
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a game hack lure, directing users to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that aligns with this lure. The primary attack pattern involves tricking the user into clicking a malicious link to initiate a download, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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 https://netcdn.online/app/479516143/how-to-get-minecraft-for-free-on-iphone-game-hack In PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/hack-coin-master-apk-358_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-hack-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/code-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-spain_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/clients-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005199.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5199 24764 bytes
SHA-256: 0bb8e4dfe602e097a6475720f21f43b5b797f93e109e03591cfa90d24b95aa0c
font_01_sfnt_off000089ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89FF 2820 bytes
SHA-256: 34dd21cbcbbf8680f9624d5ddfa25e49232e6768200f74ddacb5347fd7a5f6dc
font_02_sfnt_off000093a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93A0 18216 bytes
SHA-256: bed6c76176a434f358ebc88a31d2dbe88cb1547cd8758d4c9ade2f80066016aa

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