Malicious PDF — malware analysis report

Static analysis result for SHA-256 f91bd15a92b0c160…

MALICIOUS

PDF

32.7 KB Created: 2021-07-10 01:04:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2435f0222c66f109888f3d537e7f9c4c SHA-1: 37d8d6cdc3fbd281581482b4038823a3b24ff7f6 SHA-256: f91bd15a92b0c1603248281cc27c2eea8b7fe791c94cfca1e1550b72dce46711
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to websites offering game hacks and generators, such as 'mcpe-116-game-hack'. These links are flagged as malicious redirectors, indicating a likely phishing or malware distribution attempt. The presence of these lures suggests the document is designed to trick users into visiting potentially harmful sites, aligning with a spearphishing attachment attack pattern.

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/479516143/mcpe-116-game-hack In PDF document text
    • http://zagorjeadventureteam.hr/files/free-tiktok-followers-generator_GM835599320.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/hack-robux_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/get-me-robux_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/roblox-free-pokemon-go_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/free-tiktok-followers-quick-and-easy_GM835599320.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/minecraft-sign-up-free_GM479516143.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/how-to-get-coin-master-card-free_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/free-games-coin-master_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/free-robux-offline_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/pubg-2021-uc-glitch_GM1330123889.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/minecraft-switch-free_GM479516143.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/free-attacks-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
font_00_sfnt_off00002d44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D44 21904 bytes
SHA-256: 4df24986fc64404934d34e6654784a7860da8b15f8f4aa69e753580568695e39
font_01_sfnt_off00005dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC4 18080 bytes
SHA-256: 6cb16de7a3e9a31a41ccc00114520e051fe17f168efe9371a0f2f5578cc83e42

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