Malicious PDF — malware analysis report

Static analysis result for SHA-256 34b23ad32736b291…

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 08:13:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 27a80517ca6fe62b935b8e5c07f0472a SHA-1: f9a7c1fac206bf0c179450d5ba233722aa47b236 SHA-256: 34b23ad32736b291d9b19466fb909c2ee3b8b4bbdcebf722aebfc659b44ccfeb
160 Risk Score

Malware Insights

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

The PDF contains multiple links to redirectors and malicious infrastructure, masquerading as game hacks and free item generators. The primary lure appears to be related to 'Coin Master' game cheats. The document's structure and embedded links strongly suggest it's designed to trick users into downloading further malicious content, likely through a chain of redirects.

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/clean-master-coins-hack-game-hack In PDF document text
    • http://astdubai.co/userfiles/files/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/pubg-uc-vpn-apk_GM1330123889.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/citizen-roblox-hack_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-hack-surf-leaderboard-roblox_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-hack-roblox-app_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-spins-hack-no-human-verification_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
stream_002_off00002fce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FCE 22740 bytes
SHA-256: 0e29bad011889d5c9e7234e56c6b3b2924ace4571096bf42053d536777eaf58e
font_01_sfnt_off000062b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B8 18080 bytes
SHA-256: 9c2bf1894890945564fd7824672aa39d3658e30de4050c3be4bdf1a4a3dd007e

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