Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eb9a74c79e4012e…

MALICIOUS

PDF

41.8 KB Created: 2021-05-11 07:03:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0e97b408266deac8d01f3460cc232cc3 SHA-1: dfa786a7b6e11bd833a910a2ffa84ec2c5a78386 SHA-256: 3eb9a74c79e4012e51631bcb8faf833bb87ada17884bb3df29e5198dc06388bc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that lead to known malicious redirectors, often disguised as 'free generators' or 'game hacks'. The ML classifier strongly flagged this PDF as malicious, and the presence of a visual download button further supports a social engineering lure. The document body and embedded URLs indicate a phishing attempt to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/i-want-free-robux-game-hack In PDF document text
    • http://ikig.ru/images/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://ikig.ru/images/free-robux-com_GM431946152.pdfIn PDF document text
    • http://ikig.ru/images/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ikig.ru/images/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://ikig.ru/images/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • http://ikig.ru/images/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://ikig.ru/images/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://ikig.ru/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ikig.ru/images/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • http://ikig.ru/images/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • http://ikig.ru/images/legit-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://ikig.ru/images/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ikig.ru/images/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • http://ikig.ru/images/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://ikig.ru/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://ikig.ru/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://ikig.ru/images/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://ikig.ru/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://ikig.ru/images/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • http://ikig.ru/images/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000045a0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45A0 25176 bytes
SHA-256: fa9cba88e047f51522fe3812f4ae1158f51d7e81d9a8aeed82ae0b61721bd028
font_01_sfnt_off0000801d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x801D 18544 bytes
SHA-256: 21c84a9f4ed3b5496a815e3404d7d5cd07faeb2ee17584cb0226aa903f450845

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