Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ae07cb4dc2ac25…

MALICIOUS

PDF

43.4 KB Created: 2021-05-14 05:37:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b51a037ea0ac396bc65d8911005fe067 SHA-1: b2df12f75d8f2d259b071c57fe77dcd05b8a3c7a SHA-256: 29ae07cb4dc2ac253f96b2f78247fec5c1a9ad46bba2bbe82e193a971aa439dc
122 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links pointing to external PDF files, many of which are hosted on an IP address. This suggests a link farm designed to direct users to potentially malicious content, possibly related to game cheats or scams. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/406889139/coin-master-free-spins-link-2021-game-hack
    • http://45.115.65.99/__statics/gudangsoal/files/how-to-get-free-robux-generator_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/spin-links-for-coin-master_GM406889139.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/ways-to-get-free-robux-2021_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/how-to-get-free-coins-in-mcpe-master_GM406889139.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/coin-master-free-cards-link-2021_GM406889139.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/www-free-robux-com_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/coin-master-32-mod-hack-unlimited_GM406889139.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/roblox-admin-hack_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/can-you-give-me-free-robux_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/how-to-get-robux-easy_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/minecraft-reach-hack_GM479516143.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/coin-master-email-rewards-link_GM406889139.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/2021-free-spins-coin-master_GM406889139.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/how-to-hack-roblox-2021_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/www-roblox-com-robux-free_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/spin-free-coin-master_GM406889139.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/robuxy-com-generator_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/play-coin-master-online-free_GM406889139.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/free-spins-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_off00004bc8.bin
07d3761c7f2b27aa02fdaf83aaba6c93b64b74b6e8a0eac1f8625e2d6e16ccea
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BC8 25380 bytes
font_01_sfnt_off000086d0.bin
405c435adaafa0da304b7a4986d8f56c56dc87ed278d5cff2ac0c57977d8d7e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x86D0 18456 bytes