Malicious PDF — malware analysis report

Static analysis result for SHA-256 0498844509a99c36…

MALICIOUS

PDF

44.5 KB Created: 2021-05-17 17:30:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 61bc8e515f6965728df8bb81fd2c5eb7 SHA-1: 3378dddcbfef826a7113d452e8f00556e5491317 SHA-256: 0498844509a99c3698e7230d455a3ca5c01d36b5202faa135335f8100164b847
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, directing users to external websites. The ML classifier strongly indicated maliciousness, and the presence of a download button lure suggests a deceptive workflow. The primary URL, https://netcdn.xyz/app/406889139/fbchampion-game-hack, is likely the intended destination for a malicious payload or scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/406889139/fbchampion-game-hack
    • http://bassacctaxservices.com/images/free-roblox-accounts-that-work_GM431946152.pdf
    • http://bassacctaxservices.com/images/get-free-robux-now_GM431946152.pdf
    • http://bassacctaxservices.com/images/how-to-get-free-cards-for-coin-master_GM406889139.pdf
    • http://bassacctaxservices.com/images/coin-master-rewards-app_GM406889139.pdf
    • http://bassacctaxservices.com/images/free-robux-real-working_GM431946152.pdf
    • http://bassacctaxservices.com/images/coin-master-hack-2021-android-apk_GM406889139.pdf
    • http://bassacctaxservices.com/images/roblox-redeem-card-codes-free_GM431946152.pdf
    • http://bassacctaxservices.com/images/free-spins-coin-master-links-no-human-verification_GM406889139.pdf
    • http://bassacctaxservices.com/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdf
    • http://bassacctaxservices.com/images/how-many-levels-are-in-coin-master_GM406889139.pdf
    • http://bassacctaxservices.com/images/roblox-hack-com_GM431946152.pdf
    • http://bassacctaxservices.com/images/clean-master-free-coins-and-spins_GM406889139.pdf
    • http://bassacctaxservices.com/images/free-spin-coin-master-link-2021_GM406889139.pdf
    • http://bassacctaxservices.com/images/hack-coin-master-game_GM406889139.pdf
    • http://bassacctaxservices.com/images/coin-master-hack-xyz-apk-download_GM406889139.pdf
    • http://bassacctaxservices.com/images/rbxfree-com-free-robux_GM431946152.pdf
    • http://bassacctaxservices.com/images/coin-master-free-coins-hack_GM406889139.pdf
    • http://bassacctaxservices.com/images/earn-free-spins-for-coin-master_GM406889139.pdf
    • http://bassacctaxservices.com/images/hack-avatar_GM431946152.pdf
    • http://bassacctaxservices.com/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047da.bin
a76e1ea5f2262641e1f854113bb2e5a0d98a8a331ffadf029efeee3bae244b30
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47DA 25112 bytes
font_01_sfnt_off000081af.bin
10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
pdf-font-stream PDF embedded font (sfnt) at offset 0x81AF 2880 bytes
font_02_sfnt_off00008b9a.bin
a6b0af27d4d3b45433f1bf9322c4fc5530f0836706fea914cb1eef9ee3408c10
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9A 18364 bytes