Malicious PDF — malware analysis report

Static analysis result for SHA-256 710d93ccac6bf4bd…

MALICIOUS

PDF

45.4 KB Created: 2021-05-18 03:23:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f6dd059e9be96d25a5003024866a1acb SHA-1: dbcbb0601a4ac5af1a3efba416f03308804f6a9c SHA-256: 710d93ccac6bf4bd928c9f3e3c65a4160efbebfc4e2462a224efabbaebc1fe0e
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a large number of embedded links, many of which point to external websites related to game cheats and hacks. The ML classifier and PDF link farm heuristics indicate a high likelihood of malicious intent, likely to direct users to phishing or malware-distributing sites. The document body, though partially corrupted, contains references to "Coin Master Cards Free Cards" and a URL that aligns with the observed link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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-cards-free-cards-game-hack
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdf
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/coin-master-free-spins-daily_GM406889139.pdf
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/how-to-get-roblox-credit-for-free_GM431946152.pdf
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/how-to-get-free-mods-in-minecraft_GM479516143.pdf
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/roblox-free-followers_GM431946152.pdf
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/blogspot-coin-master-spins_GM406889139.pdf
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-pc_GM406889139.pdf
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/free-coin-and-spin-for-coin-master_GM406889139.pdf
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/freerobuxhack-us-2021_GM431946152.pdf
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/how-do-i-get-free-spins-in-coin-master_GM406889139.pdf
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/coin-master-hack-injection_GM406889139.pdf
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/my-minecraft-account-was-hacked_GM479516143.pdf
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-on-phone_GM431946152.pdf
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/minecraft-jar-free_GM479516143.pdf
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/minecraft-pocket-edition-free-download_GM479516143.pdf
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-human-verification_GM431946152.pdf
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/coin-master-daily-link_GM406889139.pdf
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/mine-minecraft-games-for-free_GM479516143.pdf
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/best-hacked-client_GM479516143.pdf
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/robuxlove-net-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aec.bin
baf77eed7f4f01227ffd0863d5935e342642bae5cc873b700661939055a7d175		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AEC 25144 bytes
font_01_sfnt_off0000852b.bin
4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x852B 3400 bytes
font_02_sfnt_off00009054.bin
d54aa51eaaaa3e2864f0114713409e316145a0183ee6aba9be1e443db1dceb19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9054 17884 bytes

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