Malicious PDF — malware analysis report

Static analysis result for SHA-256 79315cce778df7e9…

MALICIOUS

PDF

33.2 KB Created: 2021-07-06 09:01:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 93790e2358c45a744400cb151884b60a SHA-1: f81af9613a31d526f9754b5f0bbffbf211ea7819 SHA-256: 79315cce778df7e9106849859212bbc549738ccf751893640b406d6de037db7d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, including a primary link disguised as a 'Pokemon Go Free Qwilfish Game Hack'. This indicates a social engineering lure designed to trick users into visiting malicious websites. The ML classifier also flagged this PDF as malicious, supporting the observed redirection behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/1094591345/pokemon-go-free-qwilfish-game-hack In PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-free-hats_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-car-free_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-face-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-roblox-gift-card-codes-list-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/hack-robux-thegatogaming_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-clear-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spin-best-link_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robux-hack-and-bc-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-the-stuff-from-roblox-hack-week-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-obbys-may-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/como-hackear-roblox-com-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hack-particle-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-codes-generator-works_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/case-clicker-2021-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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
stream_001_off0000299e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x299E 23016 bytes
SHA-256: a895cd5e864d2cb55c32a35add5aa7584220e7ff56bb30325b75b696ca812d5b
font_01_sfnt_off00005d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3C 19040 bytes
SHA-256: 2d99dd0baf7bd44fb270a37859e56b95cc74316667e835bb48812d7fe9201e73

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