Malicious PDF — malware analysis report

Static analysis result for SHA-256 5279acb3fdccb1e0…

MALICIOUS

PDF

43.9 KB Created: 2021-06-09 00:30:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fcbbdd813b6900096d7204e9d062fcdb SHA-1: c0ea3591b858e19224128e7e8136836e24b483ff SHA-256: 5279acb3fdccb1e00bf565f21a3012f657e9d6adc6a72396e5413cbd546c367a
142 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs hosted on similar domains, suggesting a link farm designed to attract users searching for game cheats. The document body and heuristics indicate a lure for game-related hacks, likely to trick users into downloading further malicious content. The presence of a password archive lure suggests an attempt to bypass security scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/how-to-backdoor-hacking-roblox-site-v3rmillion.net-game-hack PDF link annotation
    • http://msfs-eastafrica.com/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/coin-master-hack-no-survey-2021_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/how-to-be-naked-on-roblox-free-2021_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/coin-master-hack-tool-exe_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/get-free-robux-roblox-works_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/pokemon-go-free-verizon-code_GM1094591345.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/games-in-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/master-coin-hack_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/roblox-virus-free-download_GM431946152.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_004_off00004dbd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DBD 24020 bytes
SHA-256: 02611bf5ac213554f5f6900c4eb5e3c8f911deb0312531ade2fd9fce9b939b52
font_01_sfnt_off00008488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8488 19664 bytes
SHA-256: 1fc0098b21c2500da4fb10571d6f18a0eb041a7525d3a06f7e9606efa884c15d

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