Malicious PDF — malware analysis report

Static analysis result for SHA-256 f082694fafe2346f…

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 08:40:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 629f9192e8aacfa6fa6c91ee58796ee3 SHA-1: 4b99680d8c182ab53a71c641b2d398521a2b1448 SHA-256: f082694fafe2346f488d8617be52ef7252780912e1f99360950fbc74dd8b13eb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, masquerading as game hack generators. The primary lure, 'Hack Coin Master Ios Download', points to a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or social engineering attack designed to lead users to potentially harmful 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/hack-coin-master-ios-download-game-hack In PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-tricks-and-hacks_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/roblox-good-hacks_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/cheats-coin-master-free_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/oprewards-com-login_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/roblox-free-play_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/how-to-get-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/roblox-cheats-google-chrome_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/get-free-spins-on-coin-master_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_off00003123.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3123 23584 bytes
SHA-256: d775c246db989b10d48e2c1ba5f72e56fa70c6d2c73f75bef990a02b9d6522b4
font_01_sfnt_off00006687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6687 18584 bytes
SHA-256: 9dd34722f0ffb0bb8e6b57f487670e375f299711f6c14b2ad29ed9162fe13a4a

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