Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3a8f652c9bf592…

MALICIOUS

PDF

35.8 KB Created: 2021-07-04 02:48:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b9b1a639972ac9173201435a2f2db902 SHA-1: a46ece21fc6b4063198faaa3cf5a5809b1ef9c8c SHA-256: 3d3a8f652c9bf59245fcf7ce4ad5354848bb8d1ae7bf851e44c494c43d459626
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering 'free generators' or 'hacks' for popular games like Coin Master and Roblox. These URLs are flagged as malicious redirectors, indicating a likely phishing or scam attempt to lure users to potentially harmful content. The document's structure and content strongly suggest a social engineering tactic to trick users into clicking these links.

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/406889139/coin-master-online-free-spin-game-hack In PDF document text
    • http://library.gkigadingserpong.org/repository/free-roblox-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-robuxfor-free_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/christmas-tycoon-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/gain-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robux-hack-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-deals_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-do-you-download-roblox-hacks_GM431946152.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_002_off000035fc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35FC 23060 bytes
SHA-256: bb22775b097447c7001435ba433ece6b9e875474c3f631e3bc8c7add4869c38d
font_01_sfnt_off0000699d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x699D 18248 bytes
SHA-256: 219756382ff6256e60ec1326728dd0e07af79f7e300a248e9a054b936f27f57f

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