Malicious PDF — malware analysis report

Static analysis result for SHA-256 df9754f01a782a28…

MALICIOUS

PDF

41.5 KB Created: 2021-05-11 20:01:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 404d547d0e15555bf7dab6ecad60d416 SHA-1: fbe50eb8a4b1c1bcc381ead419b4557cd9b0bb89 SHA-256: df9754f01a782a2838e8c08bded225a09091d0726a09798aba2a5c1ddba0f5bb
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links to external websites, many of which are designed to appear as free Robux or game hack downloads. The ML classifier strongly indicated maliciousness, and the presence of a link farm heuristic suggests a deliberate attempt to distribute malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/479516143/1.14-4-hacks-game-hack PDF link annotation
    • http://edvintage.com/images/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://edvintage.com/images/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://edvintage.com/images/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • http://edvintage.com/images/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://edvintage.com/images/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://edvintage.com/images/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://edvintage.com/images/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://edvintage.com/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://edvintage.com/images/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://edvintage.com/images/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://edvintage.com/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://edvintage.com/images/free-unlimited-coin-master-online-tool_GM406889139.pdfIn PDF document text
    • http://edvintage.com/images/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://edvintage.com/images/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • http://edvintage.com/images/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://edvintage.com/images/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://edvintage.com/images/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • http://edvintage.com/images/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • http://edvintage.com/images/roblox-moderators_GM431946152.pdfIn PDF document text
    • http://edvintage.com/images/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • http://www.freenom.comHeyIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004924.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4924 25040 bytes
SHA-256: b7345dd1d2980bd08fb2384638334ee50924bf38b4c146829560d345b4ab72df
font_01_sfnt_off0000816f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x816F 17748 bytes
SHA-256: 5c222ee3790d6988dab7730242936a3e132ec412c073a5d6db7623f4f1192a81

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