Malicious PDF — malware analysis report

Static analysis result for SHA-256 36ef368632b897cf…

MALICIOUS

PDF

47.0 KB Created: 2021-05-14 19:01:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: fd8062fbd338bced1e26ebe5293f58fa SHA-1: f3863697205ba1226a5653c0fe10a196849337d4 SHA-256: 36ef368632b897cf0a098bf42254103979fd1f53c51f71ffdf87713e4ee3c4c3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple links, including one pointing to a known malicious redirector infrastructure. The document body and embedded URLs suggest a lure for game-related cheats and free spins, likely intended to trick users into visiting malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 3

  • 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.
  • 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-free-spins-app-game-hack In PDF document text
    • http://gomelavto.by/images/free-coin-master-glitches_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/free-minecraft-server-hosting-with-plugins_GM479516143.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-app-for-free-spins_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/minecraft-beta-free_GM479516143.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://gomelavto.by/images/roblox-hax_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/robux-hack-generator_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_off0000491b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x491B 25988 bytes
SHA-256: 035766b7ca3e5789dcb5014d9fb5ef7dc491b4fde26029190419ddcb5a7b52b7
font_01_sfnt_off000085d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D1 3692 bytes
SHA-256: ba279dc4e71f561d3d07181743d495f2bfb24ac9e347605f73a0d94d271be77e
font_02_sfnt_off000092cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92CF 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2

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