Malicious PDF — malware analysis report

Static analysis result for SHA-256 c07f77ad0c8de103…

MALICIOUS

PDF

44.8 KB Created: 2021-05-16 19:44:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 93c92d91fc3afe0bebac79b046fc5ce1 SHA-1: d8582d2a904da3ed3e10df9acfaae36aaba20d11 SHA-256: c07f77ad0c8de103f9a81798c840e16cbe81a2170be0bc96856560d6e0742886
122 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are SEO-optimized and point to pages offering game hacks and free currency. The ML classifier strongly flagged this PDF as malicious. The document body, though partially corrupted, contains a primary URL related to 'Coin Master' free spins, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/how-to-get-100-free-spins-on-coin-master-game-hack
    • http://precisionheavyhaul.com/images/best-minecraft-hacks_GM479516143.pdf
    • http://precisionheavyhaul.com/images/promo-codes-for-free-robux_GM431946152.pdf
    • http://precisionheavyhaul.com/images/coin-master-free-spin-now_GM406889139.pdf
    • http://precisionheavyhaul.com/images/free-robux-no-password_GM431946152.pdf
    • http://precisionheavyhaul.com/images/coin-master-free-daily-spins-link-2021_GM406889139.pdf
    • http://precisionheavyhaul.com/images/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdf
    • http://precisionheavyhaul.com/images/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdf
    • http://precisionheavyhaul.com/images/coin-master-gold-cards-free_GM406889139.pdf
    • http://precisionheavyhaul.com/images/free-robux-without-downloading-anything_GM431946152.pdf
    • http://precisionheavyhaul.com/images/minecraft-games-to-play-for-free_GM479516143.pdf
    • http://precisionheavyhaul.com/images/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • http://precisionheavyhaul.com/images/free-coin-master-spins_GM406889139.pdf
    • http://precisionheavyhaul.com/images/coin-master-game-hacking_GM406889139.pdf
    • http://precisionheavyhaul.com/images/robux-free-gift-card_GM431946152.pdf
    • http://precisionheavyhaul.com/images/free-coins-and-spins-link-for-coin-master_GM406889139.pdf
    • http://precisionheavyhaul.com/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdf
    • http://precisionheavyhaul.com/images/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.pdf
    • http://precisionheavyhaul.com/images/free-robux-now_GM431946152.pdf
    • http://precisionheavyhaul.com/images/will-minecraft-dungeons-be-free_GM479516143.pdf
    • http://precisionheavyhaul.com/images/roblox-free-clothes-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d05.bin
f9aff79153b03f834b69b8aa064aeb5fa27bcdf69119fcb993ae6c81fc54abb3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D05 28724 bytes
font_01_sfnt_off00008ce4.bin
118bed2ee52f9a365e328bc160c828b8a450fef4f79d7a715d30d8386aa97d79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE4 18328 bytes

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