Malicious PDF — malware analysis report

Static analysis result for SHA-256 d126a271e24c13d8…

MALICIOUS

PDF

36.2 KB Created: 2021-06-25 17:21:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7a757c6def54e44c0b7648faa0a96e3b SHA-1: 69f8179a46aab7e21ee87d59ce6a2d4c7c54b94e SHA-256: d126a271e24c13d861b41d9119a53910cae1850b3a0fe410c2d564833c0ef9d7
220 Risk Score

Malware Insights

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

This PDF document is designed as a lure, presenting itself as a 'free generator' or 'game hack' to trick users into clicking malicious links. The primary link redirects to infrastructure known for hosting malicious content, and the document body contains numerous SEO-optimized links to other potentially malicious PDF files. The ML classifier strongly indicated maliciousness, and the presence of multiple redirector links confirms a malicious intent to lead users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/script-roblox-hacks-2021-game-hack In PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-design-it-cheats_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/rape-simulator_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/hack-booga-booga-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/robux-generator-no-survey-no-hack_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/walking-trhought-wall-cheat-engine-meme-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/hacks-for-roblox-murder-mystery-2_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/robux-only_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-hacks-on-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-on-google-map_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-weight-lifting-simulator-hack-to-get-super-strong_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/hacks-for-roblox-for-craftwars_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/sysnaspe-crack-free-2021-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-mod-apk-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 22988 bytes
SHA-256: 6890b0012ffbabf13c3aabd587e5615f6e40f2b7fe948d56df6e19819eafdd4b
font_01_sfnt_off00006714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6714 19460 bytes
SHA-256: 147091517054a658a4fa22093d50bdbbc9de944bd07f0bf98104244225e38b98

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