Malicious PDF — malware analysis report

Static analysis result for SHA-256 15948d9b19ebebfe…

MALICIOUS

PDF

36.1 KB Created: 2021-06-29 06:21:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 73049d21d2a746de03d0ab0175e2647d SHA-1: 7f8e49f9167829f57c381e6020b7250859ad89db SHA-256: 15948d9b19ebebfe714227d9840d66c6f859630be50735ebcea117df08779994
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free items to trick users into clicking malicious links. It contains numerous links to external PDFs and a primary redirector URL, indicating a phishing or scam campaign. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/roblox-speed-race-hacks-download-game-hack In PDF document text
    • https://opac.itp.ac.id/repository/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-jailbreak-walk-through-walls-hack_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-get-free-adminon-all-roblox-game_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-hack-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-roblox-gift-card-online_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-dragon-ball-future-online-script-hack_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/eclipsis-roblox-hack_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-account-generator_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/cheat-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/8rsh-roblox-jailbreak-free-vip-server_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/grabpoints-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-spin-cheat_GM406889139.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_off000033e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33E0 22832 bytes
SHA-256: 7e9519c38702e69a56ebe82e6a6dbc7a14c8ea2b13b96981773070ed7396554f
font_01_sfnt_off0000670f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x670F 19340 bytes
SHA-256: 96405e8d929ea9d8071a9d77397a6af6b0f183b24f400a4b14d18c66fbf734cc

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