Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a006bd7ee157615…

MALICIOUS

PDF

42.1 KB Created: 2021-05-19 00:09:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ff7d5d697fcb1f85d3a0c07934277405 SHA-1: bd9cb5da44249518d94f8e30b4c65808042a2cd1 SHA-256: 1a006bd7ee1576154b73b233cecfd69dc7e6eee4a89e57639b970830184b7891
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a malicious lure, employing a link farm strategy to direct users to external resources. The presence of numerous URLs, many with SEO-like titles related to game cheats and hacks, suggests an attempt to trick users into downloading potentially harmful files or visiting compromised sites. The ML classifier strongly flagged this PDF as malicious, reinforcing the suspicious nature of its content and structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/coin-master-free-spins-deutsch-download-2021-link-game-hack
    • http://arthakranti.org/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdf
    • http://arthakranti.org/images/mcpe-com_GM479516143.pdf
    • http://arthakranti.org/images/coin-master-free-coins-hack_GM406889139.pdf
    • http://arthakranti.org/images/coin-master-free-spins-promo-code_GM406889139.pdf
    • http://arthakranti.org/images/who-to-get-free-robux_GM431946152.pdf
    • http://arthakranti.org/images/free-coins-and-spins-coin-master-2021_GM406889139.pdf
    • http://arthakranti.org/images/free-robux-2021_GM431946152.pdf
    • http://arthakranti.org/images/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • http://arthakranti.org/images/coin-master-free-download_GM406889139.pdf
    • http://arthakranti.org/images/apk-coin-master-hack_GM406889139.pdf
    • http://arthakranti.org/images/minecraft-survival-hacks_GM479516143.pdf
    • http://arthakranti.org/images/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdf
    • http://arthakranti.org/images/roblox-fun-robux_GM431946152.pdf
    • http://arthakranti.org/images/give-me-free-robux_GM431946152.pdf
    • http://arthakranti.org/images/how-to-earn-free-robux_GM431946152.pdf
    • http://arthakranti.org/images/coin-master-card-hack-apk_GM406889139.pdf
    • http://arthakranti.org/images/how-to-get-free-robux-easy-hack_GM431946152.pdf
    • http://arthakranti.org/images/minecraft-115-2-hacks_GM479516143.pdf
    • http://arthakranti.org/images/free-coin-and-spin-in-coin-master_GM406889139.pdf
    • http://arthakranti.org/images/coin-master-heaven-free-daily-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000485f.bin
e44b1ebde9d622178c01390a58e5ac4d851effb0ffe194fdd3b2e2739c53fe48		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x485F 23972 bytes
font_01_sfnt_off00007efd.bin
2845a3e6ec075e64a55efc9536af757c9c9ea9b8a2b732129eaf0438470dc816		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EFD 19344 bytes

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