Malicious PDF — malware analysis report

Static analysis result for SHA-256 5338262b333543a4…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 11:20:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7cc9771166f1a96e627c56650039afe3 SHA-1: 4552da9cf0c4af532c506ac556c571a2f36d4b27 SHA-256: 5338262b333543a482358521b7247375ad73b1d00a9b7906b220c4667c81ba6b
122 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to IP addresses, advertising hacks and free items for popular games. This suggests a phishing or scam attempt to lure users to download malicious content. The ML classifier also strongly indicated maliciousness.

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://netcdn.tw/app/406889139/coin-master-hack-tool-2021-game-hack
    • http://110.232.83.89/slimsppks/repository/roblox-free-ssscripts_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/coin-master-free-spins-link-blogspot_GM406889139.pdf
    • http://110.232.83.89/slimsppks/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdf
    • http://110.232.83.89/slimsppks/repository/coin-master-daily-free-spins-link-app-download_GM406889139.pdf
    • http://110.232.83.89/slimsppks/repository/how-to-get-free-robux-2021_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/minecraft-pe-016-0-apk-download-free_GM479516143.pdf
    • http://110.232.83.89/slimsppks/repository/get-free-robux-just-by-joining-this-group_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/lucky-patcher-coin-master-hack_GM406889139.pdf
    • http://110.232.83.89/slimsppks/repository/roblox-money-hack_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/como-hackear-cuentas-de-roblox-como-amon_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/minecraft-free-apk-java-edition_GM479516143.pdf
    • http://110.232.83.89/slimsppks/repository/wurst-client_GM479516143.pdf
    • http://110.232.83.89/slimsppks/repository/coin-master-free-spin-link-today-50_GM406889139.pdf
    • http://110.232.83.89/slimsppks/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/roblox-how-to-get-free-accses-to-welcome-to-bloxburg_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/free-coin-master-spins-2021_GM406889139.pdf
    • http://110.232.83.89/slimsppks/repository/free-robux-picture_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdf
    • http://110.232.83.89/slimsppks/repository/free-coins-coin-master-hack_GM406889139.pdf
    • http://110.232.83.89/slimsppks/repository/get-free-spins-on-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031fb.bin
c46ce75b6aea1247e92d3fa85b43e029fd4f0dfc5de807e96d91b58d9348910b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31FB 22900 bytes
font_01_sfnt_off0000658c.bin
3dc977bc1210ceeedde7f87719dab6f525ca5e29bcd32cbe92ee8e1a0ab21cbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x658C 18480 bytes

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