Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac9672cee6290114…

MALICIOUS

PDF

44.3 KB Created: 2021-05-16 09:03:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 4adc6c385914edee57fc94331cc7a461 SHA-1: f5c941670ea78a22659c10a280f7dda3ada41f75 SHA-256: ac9672cee62901146d0cf0ccfca0f64974dcd88eafa5a7e06046f4df8387da07
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free Robux, directing users to a malicious redirector. The embedded URLs and the primary redirector link suggest an attempt to lead users to potentially malicious content or further download stages. No scripts were extracted, but the PDF structure and embedded links are indicative of a phishing or scam attempt.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/robuxmatch-com-free-robux-game-hack In PDF document text
    • http://bgnails.nl/images/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/free-coin-master-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/daily-coin-master_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/gain-robux_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/rewardex-robux_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/free-roebucks_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-hacks-2021_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_off00004a09.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A09 27352 bytes
SHA-256: e88bc0806825731ee5cf67d065cc808770b6178cce98ebe5c98d79fabdb6d688
font_01_sfnt_off00008993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8993 18772 bytes
SHA-256: ef8253bc9c644a400764ba46849deadc1c414499c30f017f83fef73bbdfbe327

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