Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ad3eea33a5970b…

MALICIOUS

PDF

34.8 KB Created: 2021-06-19 15:26:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d7230c0b38e3c90df70b7eec4119c920 SHA-1: 4be3f707e1bb54580111e78c03729207c8421dc5 SHA-256: 29ad3eea33a5970bfbb5aabe8f94c414a742e40ca8caee62b40adf1a8f662df0
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free currency to trick users into clicking malicious links. It contains numerous links to redirectors and link farms, such as http://netcdn.co/app/431946152/roblox-cookie-hack-game-hack, and a large number of SEO-optimized PDF links hosted on www.pspmrsmkkb.com. The document's primary function appears to be directing users to potentially malicious external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-cookie-hack-game-hack In PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-pet-food_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-free-robux-without-waiting_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-how-to-get-free-robux-in-seconds-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/speed-hack-roblox-2021-in-any-game_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-town-factory-cheats_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/get-free-roblox-today_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/regal-world-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-roblox-treasure-hunt-app_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-cookie-stealer-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-minecraft-windows-10-account_GM479516143.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
stream_002_off00003111.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3111 22664 bytes
SHA-256: 1b63b234b3f3d5c6793b9072afee0f0d8e70fc11df9671700cd4448bc5b6999e
font_01_sfnt_off000063f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F5 18776 bytes
SHA-256: f2ae450a42a71d5f3ab3403948c643cec6f15bd7dfb7dd1939bc7b16f0d363f4

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