Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7d40741f4b524e5…

MALICIOUS

PDF

33.7 KB Created: 2021-07-05 05:08:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 549a95065029bc3fe964af9179247aa8 SHA-1: f3aea221ce7cc271a6e9bc1c1dc9e17048c5275c SHA-256: b7d40741f4b524e589c87860fe55f1971d12bba88d574869ae0ab0b09fa95bc0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free in-game currency. The primary redirector URL is http://netcdn.tw/app/431946152/roblox-moderators-game-hack, which likely leads to further malicious content or phishing pages. The document body and embedded URLs reinforce this lure-based social engineering tactic.

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/roblox-moderators-game-hack In PDF document text
    • http://lib.icbc-indonesia.org//repository/how-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/minecraft-menu_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-look-like-a-noob-on-roblox-mobile-free_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-free-spins-activegamer_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/pokemon-go-free-gucci_GM1094591345.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/why-tiktok-free-download_GM835599320.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-code-roblox-hacks-python_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/who-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-robux-rapido_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-robux-script_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-cheat-on-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-any-game-ban-script-hack_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-free-spins-link-may-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_off00002e59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E59 21872 bytes
SHA-256: f630ee15301b5907a2858aa5ac42787741e525894ac34ee81377fe442b24fa1a
font_01_sfnt_off00005ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED5 18960 bytes
SHA-256: c9d852ee3d1c2440833dae6aa7c06b9bea994edf728c721d6eb665774c0b0edb

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