Malicious PDF — malware analysis report

Static analysis result for SHA-256 7729c46d6f4c9987…

MALICIOUS

PDF

43.7 KB Created: 2021-05-12 03:17:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: d51d19f127d9f74672ca9222225fd268 SHA-1: b29c9d0b5b8b947672bb6a5c9f851b47113de9de SHA-256: 7729c46d6f4c9987b29f11fda3356efefd4eef590c425a76d5219b5234b8080c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting game hacks and generators. The document body and embedded links suggest a lure for users interested in free in-game currency or cheats. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the embedded links are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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 https://netcdn.xyz/app/406889139/coin-master-hack-spins-game-download-game-hack In PDF document text
    • http://stroybelan.ru/images/krnl-download_GM431946152.pdfIn PDF document text
    • http://stroybelan.ru/images/code-free-robux_GM431946152.pdfIn PDF document text
    • http://stroybelan.ru/images/lots-of-robux_GM431946152.pdfIn PDF document text
    • http://stroybelan.ru/images/minecraft-pocket-edition-free-ios_GM479516143.pdfIn PDF document text
    • http://stroybelan.ru/images/coin-master-70-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://stroybelan.ru/images/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://stroybelan.ru/images/www-coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://stroybelan.ru/images/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • http://stroybelan.ru/images/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://stroybelan.ru/images/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://stroybelan.ru/images/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://stroybelan.ru/images/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://stroybelan.ru/images/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://stroybelan.ru/images/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • http://stroybelan.ru/images/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://stroybelan.ru/images/www-rubux_GM431946152.pdfIn PDF document text
    • http://stroybelan.ru/images/facebook-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stroybelan.ru/images/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://stroybelan.ru/images/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://stroybelan.ru/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004594.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4594 24300 bytes
SHA-256: 7004605d465af2ebb0e1f1190ebb33443cb4f95a3753aef36cad5a69f5b521d0
font_01_sfnt_off00007cf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF4 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off00008695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8695 18732 bytes
SHA-256: 9b73d77c7ba2fdf59398755aeae20ef659fba843845855bd34c74c79d9b70242

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