Malicious PDF — malware analysis report

Static analysis result for SHA-256 b79805b591267b17…

MALICIOUS

PDF

34.7 KB Created: 2021-07-06 03:53:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e1506652b5bb7c6ea032840c7bd08bf5 SHA-1: 3ce3fc168d9baca9434e8f46ae4ca34fec74df88 SHA-256: b79805b591267b17cab6324a82635e8229c77ed4a73b8aed48a8083368bf6bd6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure for game hacks and free spins, directing users to a known malicious redirector infrastructure. The embedded URL 'http://netcdn.tw/app/406889139/coin-master-daily-gift-free-spins-and-coins-link-game-hack' is a primary indicator of this malicious workflow. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to exploit vulnerabilities or trick users into downloading further malicious content.

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/406889139/coin-master-daily-gift-free-spins-and-coins-link-game-hack In PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-jailbreak-hack-client-download_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/mc-the-miner-freee-robux-hack_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-free-400-spin-link_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-roblox-noclip-hacks_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/getbucks-me-roblox-free_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-free-robux-console_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/is-bank-account-info-stored-in-roblox-if-account-hacked_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-hack-pretty-face-hack_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/lifting-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-build-a-boat-for-treasure-venom-cheats_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/kidnap-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-police-free_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/dragon-life-roblox-hack_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/best-free-software-to-make-thumbnails-on-roblox_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/get-free-robux-gg_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_off000030d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D6 22520 bytes
SHA-256: b69134f47315ba897f31f861869a2ab138c97a53684288b1efba9a521716c086
font_01_sfnt_off00006306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6306 18940 bytes
SHA-256: a6c8f3ff8a0dea06235968dd24959468b5e0dd7d526557991a378f144c82e936

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