Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd1c458503c89ac8…

MALICIOUS

PDF

43.2 KB Created: 2021-05-16 19:03:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c934f019fb6e335c5975b41ad33b257d SHA-1: d07894f14222cf29d10bb81598cd18bc07aff171 SHA-256: fd1c458503c89ac8c131252050025078bdf2ac9d5941a19e9b170633a6f33411
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which appear to be part of a link farm designed to host game-related cheats and hacks. The document body, though partially corrupted, also contains URLs suggesting a lure for game exploits. The presence of a ML classifier firing with high confidence and the 'Password-protected archive handoff' heuristic further indicate a malicious intent to trick users into downloading potentially harmful files.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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-shields-coin-master-game-hack PDF link annotation
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-gen_GM431946152.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/what-do-roblox-points-do_GM431946152.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-spin-link_GM406889139.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-redeem-code-free_GM406889139.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-win-10-free_GM479516143.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004dda.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DDA 26616 bytes
SHA-256: 4a16b389401e828ac3e1014a0bac17dbeb935f8990a395293adbdbb838ef5c4b
font_01_sfnt_off0000873c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x873C 18124 bytes
SHA-256: e085952d3720952a51e878c41e5b5c7a5f24b6488949d11870729d067ad6b009

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