Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c400db717fc6536…

MALICIOUS

PDF

43.7 KB Created: 2021-05-14 11:07:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 014f94671a5afe7d4d76f48665de6b77 SHA-1: f11bd2707731d17ecf039a6ff853e763389ea70c SHA-256: 1c400db717fc6536f83f98106b90c13ad0144be4fccb3656a06c6fe588158df5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure, disguised as a lure for free game currency. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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 https://netcdn.xyz/app/431946152/how-to-get-free-robux-youtube-game-hack In PDF document text
    • http://gomelavto.by/images/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • http://gomelavto.by/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/roblox-install-free_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://gomelavto.by/images/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/free-minecraft-server-hosting-with-plugins_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000461f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x461F 24456 bytes
SHA-256: 5facb5baa95f970274c66a5bff60271cf553369a7500d0d2f157627311a15ef4
font_01_sfnt_off00007def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DEF 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off0000879f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x879F 18444 bytes
SHA-256: c8869677d4d84c4518e8410e1128de6ae04a76f8db213e07b668dd1668cda2fe

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