Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0473fbfdc036b02…

MALICIOUS

PDF

35.7 KB Created: 2021-07-06 11:52:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 739d94887ff8898d001b46213135612c SHA-1: 3ba8afe9c75b62ec640359bce95b766e514757ca SHA-256: d0473fbfdc036b0298dbda5c574a96502a863597f009efb220d8e23570fb8e6b
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains numerous links designed to lure users into downloading game hacks or obtaining free in-game currency. The primary URL, http://netcdn.tw/app/479516143/minecraft-pe-free-apk-game-hack, and the extensive list of links hosted on digilib.stimlog.ac.id suggest a malicious redirection or phishing scheme. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/479516143/minecraft-pe-free-apk-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/free-robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/robloxcom-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-games-on-roblox-that-work_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/como-tener-anti-gravedad-en-roblox-hack-check-crashed_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-cute-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-do-i-get-robux-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hack-robux-cheat-engine-61_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-cheats-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-without-playing-a-game_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-build-a-boat-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-spins-and-coins-for-iphone_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/nuevo-hack-para-dragon-ball-rage-cesarius-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-design-it-hack_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_off0000352d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x352D 23036 bytes
SHA-256: 61879e5f67fb792de7a424b85262c3dbf7c18fa1d5a427b97fbca13d49b26140
font_01_sfnt_off000068e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68E1 18356 bytes
SHA-256: 3de400347f681560e80a0db370a0d77c7f67bbb464d37fe0ec9a1adb3b0b5f9d

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