Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8158be6c17d1c89…

MALICIOUS

PDF

49.5 KB Created: 2021-05-20 03:13:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c5ca865fb1ddf019b2d310accf211511 SHA-1: d3416e1ec1390378a196e1defe5fdd6b5e71adcd SHA-256: a8158be6c17d1c89c9e94c79a2745aaddd07965a2d1062a3892af0043a50574a
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which appear to be SEO-optimized for game-related hacks and free items. The ML classifier and PDF link farm heuristics indicate a high likelihood of malicious intent, possibly to redirect users to phishing sites or download further malware. The presence of a download button lure reinforces the deceptive nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

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/free-links-coin-master-game-hack
    • http://library.acehresearch.org/repository/free-coin-master-hack-no-verification_GM406889139.pdf
    • http://library.acehresearch.org/repository/will-minecraft-ever-be-free_GM479516143.pdf
    • http://library.acehresearch.org/repository/blox-supply-free-robux_GM431946152.pdf
    • http://library.acehresearch.org/repository/coin-master-free-spins-hack-2021_GM406889139.pdf
    • http://library.acehresearch.org/repository/free-robux-games-on-roblox_GM431946152.pdf
    • http://library.acehresearch.org/repository/coin-master-free-spin-whatsapp-group_GM406889139.pdf
    • http://library.acehresearch.org/repository/free-spins-coin-master-blogspot_GM406889139.pdf
    • http://library.acehresearch.org/repository/roblox-free-play-no-download_GM431946152.pdf
    • http://library.acehresearch.org/repository/earn-robux-websites_GM431946152.pdf
    • http://library.acehresearch.org/repository/how-to-get-free-robux-without-paying_GM431946152.pdf
    • http://library.acehresearch.org/repository/coin-master-heaven-free-spins_GM406889139.pdf
    • http://library.acehresearch.org/repository/coin-master-free-spins-save_GM406889139.pdf
    • http://library.acehresearch.org/repository/wurst-mc_GM479516143.pdf
    • http://library.acehresearch.org/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdf
    • http://library.acehresearch.org/repository/pokemon-go-free-walk-hack_GM1094591345.pdf
    • http://library.acehresearch.org/repository/can-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://library.acehresearch.org/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://library.acehresearch.org/repository/today-coin-master-spin-free_GM406889139.pdf
    • http://library.acehresearch.org/repository/update-coin-master-free-spins_GM406889139.pdf
    • http://library.acehresearch.org/repository/coin-master-mod-apk_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a58.bin
1568ae82c271c204eadadc2759e94a4b97205380a684380f4f0e348697ca4599		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A58 29480 bytes
font_01_sfnt_off000088ae.bin
a17c2a746d49ac23b23e38a371e32fddecfcd91b10cf42ff6155bff6b8a07e91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88AE 4028 bytes
font_02_sfnt_off0000964e.bin
6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530		 pdf-font-stream PDF embedded font (sfnt) at offset 0x964E 2788 bytes
font_03_sfnt_off0000a03d.bin
c5130e18caf6f7222c4492e4e2e2fc6b4580e14129763dcab090a363ad6db2dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA03D 17880 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.