Malicious PDF — malware analysis report

Static analysis result for SHA-256 56a8835cadbf85c3…

MALICIOUS

PDF

33.1 KB Created: 2021-06-29 08:05:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2ecdacad96f3fb9d0f4a698cdc377516 SHA-1: 64d63e9b29f248ae11612d987ea8e85442c649d5 SHA-256: 56a8835cadbf85c37df572034d945b2f385acdb56c444191785e523bd150962c
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game items and hacks to trick users into clicking malicious links. The document contains numerous links to SEO link farms and a known malicious redirector infrastructure, likely intended to lead users to further malicious content or phishing sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/free-roblox-cute-hair-game-hack In PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-roblox-script-exector-september-2021_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/script-free-robux-2021-no-fake_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/como-ser-hacker-en-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-cheating-sex_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-fake_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/glitch-for-free-robux-2021-november_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-gift-codes-for-roblox_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-free-wings-edit-avatar_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/can-you-use-free-models-in-roblox_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-hacks-instaler_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/hack-menu-exploit-script-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/aristois-minecraft-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
font_00_sfnt_off00002d63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D63 21468 bytes
SHA-256: 4a6f962bff81900081e82e476f7ae78e3f24a9d8bfd5e59e474537b6af2d16b7
font_01_sfnt_off00005c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C39 19012 bytes
SHA-256: bc637851621343b0abf5a47b826fee3f870b693bcf3984e74cabc59ddf3d386e

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