Malicious PDF — malware analysis report

Static analysis result for SHA-256 aadee7c5a6c4e035…

MALICIOUS

PDF

42.7 KB Created: 2021-05-14 00:14:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7e7718578038c01ca239f57c7a8c3795 SHA-1: edfdf93777f61db26adf6ed52fd0c30e3488b160 SHA-256: aadee7c5a6c4e035462724ebe61ca5ed4adabef4b2ced61dd7248069fa3718bc
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier and contains a large number of external links, many of which appear to be part of an SEO link farm. The document body, though heavily obfuscated, contains URLs related to game hacks and free in-game currency, suggesting a lure for potentially unwanted or malicious content. The presence of numerous external links indicates an attempt to redirect the user to potentially harmful websites.

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/free-spins-coin-master-without-completing-offers-game-hack
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/free-robux-only-username_GM431946152.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/how-do-you-hack-minecraft_GM479516143.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/hack-coin-master-download-ios_GM406889139.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/free-coin-master-gift-link_GM406889139.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/how-to-get-free-coins-on-coin-master_GM406889139.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/coin-master-free-spins-1-coin-master_GM406889139.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/robux-free-co_GM431946152.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/coin-master-free-spin-link-app_GM406889139.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/get-robux-now_GM431946152.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/roblox-data-breach_GM431946152.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/coinmaster-blogspot_GM406889139.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/coin-master-spins-hack-2021_GM406889139.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/roblox-its-free_GM431946152.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/free-money-and-spins-coin-master_GM406889139.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/free-minecraft-gift-card_GM479516143.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/coin-master-free-spin-realme-products_GM406889139.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/best-free-spins-for-coin-master_GM406889139.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aa9.bin
cb9073347475da4e818e530349106f7ffc7b02a4a8d027327873d7089d0e6b72		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AA9 24392 bytes
font_01_sfnt_off00008281.bin
94ec3d6dd7afe22736a4406c77b2a22b2801cceff0f201dfa37f6b15e40fa38c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8281 19012 bytes

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