Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ee75a6523cd727…

MALICIOUS

PDF

46.3 KB Created: 2021-05-15 00:32:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 86a01e9e5fab6f571799992933aeeec7 SHA-1: 755dd3e5d116cdb95f03e4d85a497c897961232d SHA-256: a6ee75a6523cd72756b5b3c3a4b0d08fc1007b9c774952330ea90e9b594cf224
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm designed to attract traffic. The document body and extracted URLs indicate a lure related to game hacks and cheats, aiming to trick users into downloading malicious content. While no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of malicious intent, likely to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8696

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/is-coin-master-hacks-safe-game-hack
    • http://www.dolciariavarone.com/images/how-to-install-minecraft-for-free-on-ios_GM479516143.pdf
    • http://www.dolciariavarone.com/images/coin-master-free-spins-hack-apk-download_GM406889139.pdf
    • http://www.dolciariavarone.com/images/haktuts-coin-master-free-daily-spins_GM406889139.pdf
    • http://www.dolciariavarone.com/images/legit-coin-master-hack-without-verification_GM406889139.pdf
    • http://www.dolciariavarone.com/images/free-robux-real-2021_GM431946152.pdf
    • http://www.dolciariavarone.com/images/free-spins-and-coins-coin-master-links_GM406889139.pdf
    • http://www.dolciariavarone.com/images/minecraft-bedrock-edition-free-with-java_GM479516143.pdf
    • http://www.dolciariavarone.com/images/wurst-client-download_GM479516143.pdf
    • http://www.dolciariavarone.com/images/facebook-coin-master_GM406889139.pdf
    • http://www.dolciariavarone.com/images/free-promo-codes-for-robux_GM431946152.pdf
    • http://www.dolciariavarone.com/images/free-robux-hack-us_GM431946152.pdf
    • http://www.dolciariavarone.com/images/daily-free-spin-link-in-coin-master_GM406889139.pdf
    • http://www.dolciariavarone.com/images/promo-codes-for-free-robux_GM431946152.pdf
    • http://www.dolciariavarone.com/images/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdf
    • http://www.dolciariavarone.com/images/coin-master-gold-cards-free-link_GM406889139.pdf
    • http://www.dolciariavarone.com/images/huskybuscom-free-robux_GM431946152.pdf
    • http://www.dolciariavarone.com/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdf
    • http://www.dolciariavarone.com/images/how-to-get-free-robux-app_GM431946152.pdf
    • http://www.dolciariavarone.com/images/apps-for-free-robux_GM431946152.pdf
    • http://www.dolciariavarone.com/images/coin-master-free-gold-cards-link-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e83.bin
a2a18956bb023968f7dd7d176467e0ae9170c346de2e40bd7cdb417788190040		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E83 24844 bytes
font_01_sfnt_off000087a8.bin
c953d730e49f69c7d62e02a926729ae4a31de13d9a976dc4a95b39cf47066c93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87A8 3560 bytes
font_02_sfnt_off0000942e.bin
fe1f2daf970176796b30352a80040e1234ee7b6b28ca613a5dcb302da82e852c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x942E 17716 bytes

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