Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc9bf75ca6db88c2…

MALICIOUS

PDF

43.3 KB Created: 2021-05-15 11:04:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: eae9e4b682f9bd0f7d21f47d929aff24 SHA-1: 5c9ed4a09b865d54cf5f7b76dfc28ce1069a8e5d SHA-256: bc9bf75ca6db88c23a7ef2bf8a0cea269fc546a1bcbce3450811094a093e22e6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free generators to entice users into clicking malicious links. The document contains multiple embedded URLs pointing to known malicious redirector infrastructure, designed to lead users to potentially harmful content or further malware downloads. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-hack-roblox-game-hack In PDF document text
    • https://omhelsjehart.nu/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://omhelsjehart.nu/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://omhelsjehart.nu/images/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • https://omhelsjehart.nu/images/minecraft-bedrock-hacks-windows-10_GM479516143.pdfIn PDF document text
    • https://omhelsjehart.nu/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://omhelsjehart.nu/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://omhelsjehart.nu/images/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • https://omhelsjehart.nu/images/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • https://omhelsjehart.nu/images/best-hacked-client_GM479516143.pdfIn PDF document text
    • https://omhelsjehart.nu/images/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • https://omhelsjehart.nu/images/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://omhelsjehart.nu/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://omhelsjehart.nu/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://omhelsjehart.nu/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://omhelsjehart.nu/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://omhelsjehart.nu/images/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://omhelsjehart.nu/images/free-robux-glitch_GM431946152.pdfIn PDF document text
    • https://omhelsjehart.nu/images/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • https://omhelsjehart.nu/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://omhelsjehart.nu/images/free-roblox-accounts-2021-with-robux_GM431946152.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_off00004a86.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A86 25724 bytes
SHA-256: c75dd883c46a98717d4975decffc1a919bc5fadbadd31ce03b42a5ee46343104
font_01_sfnt_off000086a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A7 18344 bytes
SHA-256: 73440050ee62d9c8dc97d7cf0d13859b5ca63a66159f36279ab18a86d0bf293f

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