Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3268dda488c343a…

MALICIOUS

PDF

42.2 KB Created: 2021-05-16 14:03:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 97ab070ead6578671f3d3fc0544dec85 SHA-1: 6123128d06fdb8ae60f9d681db123ac7cddf5092 SHA-256: e3268dda488c343afbb2ab6eda85386a60d81a0d7c2e1faa1b0c9f2f0f1a9da0
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF links, suggesting a link farm. The document body and embedded URLs indicate a lure for game hacks and generators, likely intended to lead users to download malicious files. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/free-generator-game-hack
    • http://subarulegacy.com/images/coin-master-games-download-free_GM406889139.pdf
    • http://subarulegacy.com/images/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdf
    • http://subarulegacy.com/images/free-robux-without-any-verification_GM431946152.pdf
    • http://subarulegacy.com/images/free-bling-bling-card-coin-master_GM406889139.pdf
    • http://subarulegacy.com/images/robux-come_GM431946152.pdf
    • http://subarulegacy.com/images/coin-master-free-spins-coins_GM406889139.pdf
    • http://subarulegacy.com/images/roblox-hack-download_GM431946152.pdf
    • http://subarulegacy.com/images/free-spins-on-coin-master-link_GM406889139.pdf
    • http://subarulegacy.com/images/coin-master-cheats-2021_GM406889139.pdf
    • http://subarulegacy.com/images/coin-master-hacker-club_GM406889139.pdf
    • http://subarulegacy.com/images/hack-a-game_GM431946152.pdf
    • http://subarulegacy.com/images/free-spins-for-coin-master-that-work_GM406889139.pdf
    • http://subarulegacy.com/images/coin-master-hack-software_GM406889139.pdf
    • http://subarulegacy.com/images/free-robux-generator-2021_GM431946152.pdf
    • http://subarulegacy.com/images/coin-master-attack-block-hack_GM406889139.pdf
    • http://subarulegacy.com/images/free-spins-and-coins-for-coin-master_GM406889139.pdf
    • http://subarulegacy.com/images/coin-master-hack-xyz-2021_GM406889139.pdf
    • http://subarulegacy.com/images/coin-master-hack-lost-world-2021-com_GM406889139.pdf
    • http://subarulegacy.com/images/free-coins-on-coin-master_GM406889139.pdf
    • http://subarulegacy.com/images/how-can-i-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004886.bin
815b4e630842cdb9eb99243fe12cec71618af88bfa02c74511f51322affa80b7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4886 26036 bytes
font_01_sfnt_off000083e4.bin
3a905730409273d870ff573b7baf28e8fde68c17f4b305340d785871e619a609		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83E4 17840 bytes

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