Malicious PDF — malware analysis report

Static analysis result for SHA-256 48bcc16b6bad800c…

MALICIOUS

PDF

38.0 KB Created: 2021-06-18 20:17:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 618ec678e5f77451beece908677ea540 SHA-1: afae624929d755798155218871915304bf23f628 SHA-256: 48bcc16b6bad800c50db761a775a33d3f95894ea2c6a235f57463fade31fca83
102 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are presented as download opportunities for game cheats and hacks. The ML classifier strongly indicated maliciousness, and the presence of a link farm heuristic further supports this. The document's content and structure suggest a phishing or malware distribution attempt, likely via a malicious link embedded within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://netcdn.co/app/431946152/how-to-hack-in-roblox-vehicle-simulator-game-hack
    • https://estalagemmonteverde.com.br/images/free-spins-for-coin-master-ios_GM406889139.pdf
    • https://estalagemmonteverde.com.br/images/coin-master-hack-mod_GM406889139.pdf
    • https://estalagemmonteverde.com.br/images/getbucks-free-roblox-website-game_GM431946152.pdf
    • https://estalagemmonteverde.com.br/images/free-gems-roblox_GM431946152.pdf
    • https://estalagemmonteverde.com.br/images/roblox-cheat-engine-framed-hack_GM431946152.pdf
    • https://estalagemmonteverde.com.br/images/how-to-hack-someone-and-take-their-robux_GM431946152.pdf
    • https://estalagemmonteverde.com.br/images/minecraft-pc-free_GM479516143.pdf
    • https://estalagemmonteverde.com.br/images/how-to-get-infinite-robux_GM431946152.pdf
    • https://estalagemmonteverde.com.br/images/free-coins-and-free-spins-coin-master-2021_GM406889139.pdf
    • https://estalagemmonteverde.com.br/images/free-spins-coin-master-app-ios_GM406889139.pdf
    • https://estalagemmonteverde.com.br/images/roblox-cheats-to-get-robux-and-tix_GM431946152.pdf
    • https://estalagemmonteverde.com.br/images/how-to-hack-in-roblox-prison-life_GM431946152.pdf
    • https://estalagemmonteverde.com.br/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdf
    • https://estalagemmonteverde.com.br/images/link-coin-master_GM406889139.pdf
    • https://estalagemmonteverde.com.br/images/free-robux-codes-no-verification_GM431946152.pdf
    • https://estalagemmonteverde.com.br/images/cmaster-club-coin-master-hack_GM406889139.pdf
    • https://estalagemmonteverde.com.br/images/free-spins-coin-master_GM406889139.pdf
    • https://estalagemmonteverde.com.br/images/how-to-free-robux_GM431946152.pdf
    • https://estalagemmonteverde.com.br/images/coin-master-link-spin_GM406889139.pdf
    • https://estalagemmonteverde.com.br/images/roblox-ninja-legends-hack-apk_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003ca2.bin
6984826b6032fe9abbbf3dd74e87a2857e71b53c205eda1ab39b93c043774613
pdf-font-stream PDF embedded font (sfnt) at offset 0x3CA2 22560 bytes
font_01_sfnt_off00006e8d.bin
a986a5ff6d2e5f5ca99d92f271958e60d918307c5832ae558f3e364149d45df5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8D 19560 bytes