Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be6e53858f96c6c…

MALICIOUS

PDF

46.8 KB Created: 2021-06-09 09:39:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9b6972a43b2d050113a02faeba29dc0c SHA-1: 6c4ee4dcfb10bf8a69bb52ac70524400222142e4 SHA-256: 1be6e53858f96c6c64fc749057e41f7e0749add51004e794ba7a3291cb3a6f0a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a significant number of external links, many with SEO-like slugs, suggesting a link farm or redirection scheme. The document body, though partially corrupted, contains a URL related to game cheats, and the heuristics indicate a high likelihood of maliciousness. The presence of a 'download button' lure further supports the intent to trick users into navigating to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 4

  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/431946152/how-to-get-a-mythic-for-free-in-assasin-roblox-game-hack PDF link annotation
    • https://www.flexcable.com/images/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • https://www.flexcable.com/images/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://www.flexcable.com/images/robux-for-offers_GM431946152.pdfIn PDF document text
    • https://www.flexcable.com/images/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • https://www.flexcable.com/images/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • https://www.flexcable.com/images/hackear-coin-master-android_GM406889139.pdfIn PDF document text
    • https://www.flexcable.com/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://www.flexcable.com/images/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • https://www.flexcable.com/images/coin-master-daily-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://www.flexcable.com/images/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://www.flexcable.com/images/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://www.flexcable.com/images/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • https://www.flexcable.com/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.flexcable.com/images/coin-master-free-spins-23-march-2021_GM406889139.pdfIn PDF document text
    • https://www.flexcable.com/images/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.flexcable.com/images/how-to-get-free-robux-actually-2021_GM431946152.pdfIn PDF document text
    • https://www.flexcable.com/images/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.flexcable.com/images/hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://www.flexcable.com/images/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • https://www.flexcable.com/images/coin-master-map_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_004_off000055f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55F0 25952 bytes
SHA-256: a44a67035145209a545d21e7197539e95e847314d32f5045c85fa9bf10f421a5
font_01_sfnt_off00009235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9235 19108 bytes
SHA-256: 16dc28520b5d9c8730119853a0b5e64689ae61976dc46a96592c502e4fd3f67f

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