Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf44a12c8442da3…

MALICIOUS

PDF

45.6 KB Created: 2021-05-14 17:07:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e9f2fe5adc608c0588d51f2af6a246da SHA-1: b69bbe289e5c06018ba60423e229306e15f766f6 SHA-256: abf44a12c8442da3fa06f4732ee33e502fad13a5db9f612f15084001527c02bb
122 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links pointing to external resources, many of which are hosted on the IP address 45.115.65.99. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a tactic to distribute various malicious or deceptive documents. The presence of a direct IP address link and the ML classifier's high confidence score further support a malicious classification. The document body, though heavily obfuscated, contains URLs that align with the link farm, indicating a lure for users seeking game-related exploits or currency.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/431946152/rbxdemon-game-hack
    • http://45.115.65.99/__statics/gudangsoal/files/minecraft-bedrock-free-server-hosting_GM479516143.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/how-can-i-get-robux_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/https-oprewards-com-roblox_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/free-roblox-groups_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/how-to-get-100-robux-for-free_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/how-to-get-roblox-credit-for-free_GM431946152.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/play-coin-master-online-free_GM406889139.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/coin-master-free-spins-2021-hack_GM406889139.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/free-spin-coin-master-2021-link_GM406889139.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/coin-master-promo-code-2021_GM406889139.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/free-robux-no-human-verification_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/coin-master-free-spins_GM406889139.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/a-lot-of-robux_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/get-free-robux-generator_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/how-to-get-robux-fast_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/coin-master-extra-spins_GM406889139.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/coin-master-club-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004916.bin
cdacd390103c6aebd96bdf134bec3d6030fe67c4c8e5a76de961c8b0685cad4c
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4916 25916 bytes
font_01_sfnt_off000085f3.bin
bab8933fc39dc331bc4c1c904a82b1432ab2e02478fa0a59453c98c5c231da8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x85F3 2956 bytes
font_02_sfnt_off00009013.bin
84e994ea3e0766e4b6b44f1efc08852f1b1b6721f581ba32b946cb803bfb180d
pdf-font-stream PDF embedded font (sfnt) at offset 0x9013 18144 bytes