Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f949d54b12bbd2d…

MALICIOUS

PDF

44.4 KB Created: 2021-05-16 10:42:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 7a6120175f734ebdb8ab893f8ea2bf51 SHA-1: 91839b649cef07bc2bf45bcce50abd79a4e7058b SHA-256: 1f949d54b12bbd2d949e55b16feca5f29867cd78fdea6f1f66ebc7e517ec3127
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links designed to lure users into clicking on them, promising free game items or hacks. One primary link directs to a known malicious redirector infrastructure. The document body and embedded links suggest a scam or phishing attempt to drive traffic to potentially malicious sites that may host further exploits or malware.

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 https://netcdn.xyz/app/479516143/how-to-get-minecraft-dungeons-for-free-game-hack In PDF document text
    • http://bgnails.nl/images/coin-master-pc-hack_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/free-roebucks-com_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-get-stuff-that-cost-coins-free-mcpe-master_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/113-hacked-client_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/send-me-500-2021-spins_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-free-spins-ios-app_GM406889139.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_off00004e02.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E02 27420 bytes
SHA-256: 3841bab08d83f321de3934726e473918970d565c07126499ca828f81682aca37
font_01_sfnt_off00008aa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA3 18472 bytes
SHA-256: 65ee82f26cafa7906902f4dbf8f4098f0781a130d3f16ad2d63d9ccc83542dd0

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