Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b5ea44270bfbbc2…

MALICIOUS

PDF

33.7 KB Created: 2021-06-19 22:36:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e6132bce7af29c5e16dca8dbdbc268b5 SHA-1: 5a8007f20ed4a26a5789880666f2533b23230b92 SHA-256: 8b5ea44270bfbbc21264da36c0a9920d7beb53200e41cd42e704832aaa4471b4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures for game-related cheats and currency. The document body and heuristics indicate a clear intent to trick users into clicking these links, likely leading to further malicious content or downloads. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.co/app/431946152/free-vip-server-for-roblox-gravity-shift-game-hack In PDF document text
    • http://baxtton.com/sites/default/files/files/wurst-115_GM479516143.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/spin-coin_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/coin-master-level-4_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/robux-only_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/coin-master_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/free-robux-download_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F38 21000 bytes
SHA-256: 03d1f22f2df1f31d083f0bbde56ed643ed315f2f1f33208ee03b6d3b598b9a86
font_01_sfnt_off00005ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CCD 19644 bytes
SHA-256: 0e49e109eae7a51bda93129e866da7e94e4e65d7e7308dd1bb8d493d63f2944f

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