Malicious PDF — malware analysis report

Static analysis result for SHA-256 a264f0b47258be81…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 07:36:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 24ef4b144e75fbc91ba24522da15f1be SHA-1: ca3ad1a55ca9bef36b9b0dd08c9a3cff83a81182 SHA-256: a264f0b47258be81f772c03ab78344c05ebea8f42b858d7416280c75896c02ff
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links designed to lure users to malicious websites, including a primary redirector promising free game currency. The document body and embedded URLs indicate a scam targeting gamers, likely leading to further malware or phishing. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.tw/app/406889139/500-free-spins-coin-master-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-cards-pin-number-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-cracked-client_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/make-your-own-roblox-shirt-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/go-to-this-website-for-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hack-online-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-protect-speed-hacking-from-games-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-g_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-hack-robux-2021-android-ios-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hacks-for-roblox-case-clicker_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-make-ur-own-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-admin-commands-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/adopt-me-roblox-hack-money_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-hack-apk_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_off0000303c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x303C 22848 bytes
SHA-256: 0d6bb4583ec342a238d91f3bdb157525d624341eefd17f19216f9f15b0628e61
font_01_sfnt_off0000631f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x631F 18480 bytes
SHA-256: f050a5cb8527be99d3c3e84738d571a41e36df8bd1ad63ca537930e630161d23

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