Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2957346a57cdbe3…

MALICIOUS

PDF

34.3 KB Created: 2021-06-29 01:57:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 709718330fd301e23fc4fcf603423004 SHA-1: ce8cb92f0844bb71b1660358ecda17e8e1851f11 SHA-256: a2957346a57cdbe3634c66de00ea5277ab9aa205ff7968ed8833b5b3c868cf3d
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free Robux and game hacks to entice users. It contains numerous links to redirectors and link farms, including the malicious URL http://netcdn.co/app/431946152/free-robux-rbxboost-game-hack, which likely leads to further malicious content or malware downloads. The document's structure and embedded links suggest a phishing or scam campaign designed to exploit user interest in online games.

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/free-robux-rbxboost-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/how-do-you-send-a-roblox-fottage-of-someone-hacking_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-step-by-step-password-pictures-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coinmasterhack-club_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-money-in-roblox-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-limitless-free-robux-unpatched_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-do-you-be-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-robux-generator-hack-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hide-and-seek-extreme-roblox-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/new-cheat-emgine-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-online-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-demon_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/cheat-codes-vip-roblox-id_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_off00002f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F72 22420 bytes
SHA-256: 2a3aeadb395abe90cc987f49e430135960e7a672ef3f360fa589082578c3fcd2
font_01_sfnt_off0000617c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617C 18820 bytes
SHA-256: bf28bfa8788c63d69edc9e9f9d82dc87214abeec10c426df5b8d8f66ddb1e9fe

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