Malicious PDF — malware analysis report

Static analysis result for SHA-256 21022bfafbcd9893…

MALICIOUS

PDF

33.2 KB Created: 2021-06-21 08:07:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 304d2aaa48eae147d0b140bc8fec9289 SHA-1: 6cf9f9865c17514fb82b49d219762ed756df40bd SHA-256: 21022bfafbcd989312dd4544904d272f6a4d814daae508783e02f78b816f90d6
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are SEO-optimized and point to game cheats or "Robux Generators." The presence of a "CLICK HERE TO ACCESS ROBUX GENERATOR" call-to-action, combined with the ML classifier flagging the PDF as malicious, strongly suggests a lure to a malicious site or download. The document's structure and content indicate it's designed to trick users into clicking these links, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/roblox-dragon-ball-rage-cheats-game-hack PDF link annotation
    • http://arkivthy.dk/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/roblox-wanted-money-hack_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/unlimited-spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/da-hood-hack-tuto-roblox_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • http://arkivthy.dk/images/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • http://arkivthy.dk/images/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/meep-city-kid-gives-free-robux_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/roblox-how-to-get-anything-for-free-2021_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/how-to-hack-people-on-roblox-youtube_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/pokemon-go-free-nickname_GM1094591345.pdfIn PDF document text
    • http://arkivthy.dk/images/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • http://arkivthy.dk/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/roblox-prison-life-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/lazyblox-com-free-robux_GM431946152.pdfIn 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
font_00_sfnt_off000029e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29E2 22836 bytes
SHA-256: d8adf00f6050cea092b7dfe2dd9ead0056bdc037379816c27b9c491ee2ae95ad
font_01_sfnt_off00005d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D1F 18924 bytes
SHA-256: ebd6ea517f4ab668b3339a66b6b4dd650faac8e51c5a594240f5adcd2ae2706a

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