Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab96c04a94a3856b…

MALICIOUS

PDF

53.6 KB Created: 2021-06-10 23:19:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 1ce57f3505d46616ad1bf55928ac0d04 SHA-1: 80809138fcbcafb4ae0a3f023f198220de8ce999 SHA-256: ab96c04a94a3856bec2b82098e33974cbd8bb38de6abedadb6f459866632d58a
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to lure users to external websites, including a primary link to a malicious redirector. The document body and heuristics indicate a scam related to free game items or hacks, likely intended to lead users to phishing or malware download sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9491

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 https://netcdn.tw/app/431946152/how-to-get-free-stuff-on-roblox-hack-game-hack In PDF document text
    • http://digilib-ppsunisma.ac.id/repository/is-it-hacking-if-i-use-autoclicker-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-hack-on-roblox-jailbreak-ipad_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-robux-2021-today_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-cattlog-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/pubg-8-uc_GM1330123889.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000504d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x504D 28432 bytes
SHA-256: 796f512253279dca5699559892664eaf8673e912390a56421f860ed3a3771238
font_01_sfnt_off0000908c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x908C 4712 bytes
SHA-256: 88f7d99cf5b8d6876941368ab5c27ffc0439cf2e4827d5d6d69055d2a2371207
font_02_sfnt_off0000a01d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA01D 5756 bytes
SHA-256: a7a69a356750c58f853193ac64834dcf3e4080fc2a8f6e9107645a696c81e11e
font_03_sfnt_off0000ad6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD6F 18756 bytes
SHA-256: 7997efece31111c54637525132e8be8485ba1e3ddc98bd57088f22ec9f6c876f

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