Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eb35d084d3fede0…

MALICIOUS

PDF

43.7 KB Created: 2021-05-11 00:44:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 826256c803042215106b2b09c14f5423 SHA-1: 9682b006e20c5acc504707ddc365c3e5fd1b9ce3 SHA-256: 8eb35d084d3fede0a9839b073e9beacb256ed80db3076b40d9014f9b2cffcada
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, disguised as a 'Roblox Free Draw Game Hack'. The document body and embedded URLs strongly suggest a lure for users interested in game-related cheats or generators. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/roblox-free-draw-game-hack In PDF document text
    • http://www.homesweethome.pl/images/village-3-coin-master_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/www-rbxhut-com_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/hack-master-coin-pc_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • http://www.homesweethome.pl/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-games-coin-master_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/wurst-client_GM479516143.pdfIn PDF document text
    • http://www.homesweethome.pl/images/how-to-hack-coin-master-ios_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_003_off00004b8b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B8B 26036 bytes
SHA-256: 554330c654a65f2b5b6cd86300655fdc66abc84a3fae40c74efbb2d678357092
font_01_sfnt_off000087d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D7 18508 bytes
SHA-256: d43aad8391cc92c6a460772e2941ce4b971725fdced8eeeb4fc6fe10188b1862

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