Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c256a0f87dc9ae0…

MALICIOUS

PDF

33.7 KB Created: 2021-07-03 13:45:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 76fe56c0e814ed02836dede66a198df0 SHA-1: 2503d580418defd1727d5f1692d01f53bb1b2236 SHA-256: 1c256a0f87dc9ae0ccf2118c6f978ea677f51c009d28579a2cc98a354fab266e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game items and hacks to entice users into clicking malicious links. The embedded URLs, including http://netcdn.tw/app/431946152/free-roblox-outfits-2021-game-hack, are identified as belonging to known malicious redirector infrastructure. The document's content and structure strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites.

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.tw/app/431946152/free-roblox-outfits-2021-game-hack In PDF document text
    • http://digilib.uim.ac.id/repository/granny-roblox-free-money-pro-hacks_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-hack-into-denis-acount-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-face-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-free-robux-guava-juice_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/grabpoints-robux_GM431946152.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_off00002cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CDD 21944 bytes
SHA-256: 79d1e5da042a7ab4c850d57362448da7270a893b7195a95d189a392b3d462180
font_01_sfnt_off00005d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D82 19416 bytes
SHA-256: a242c086af701212af7b881199acd0b204cb1f7b110dba78a4069fe4bdcc1034

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