Malicious PDF — malware analysis report

Static analysis result for SHA-256 04390a500e902704…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 12:55:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 08ac657ca59ffc219fcb703a5d358a3a SHA-1: 80b3d9403a4a0d3c7120f0ac9ba551bda9c88c9c SHA-256: 04390a500e902704b4a85589d9d19e2996c5a4f8c03a67de9a507e5140c1e6ed
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one to a known malicious redirector at http://netcdn.tw/app/431946152/hack-roblox-players-game-hack. This redirector likely serves as a lure for game hacks or cheats, aiming to trick users into downloading malware or visiting further malicious sites. The document's structure and content strongly suggest a phishing or social engineering attack, likely delivered as a spearphishing attachment.

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.tw/app/431946152/hack-roblox-players-game-hack In PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-zombie-rush-cheats_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/speed-hack-download-roblox-dungeon-quest_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-md5-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-hack-roblox-2021-mac_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-jailbreak-hack-client-download-free-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-without-sever_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/breezex-adventures-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-build-a-boat-hack-nopde_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/como-hackear-cuentas-de-roblox-con-un-programa_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-clothe-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.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_off0000310c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x310C 22652 bytes
SHA-256: d3b6c6318c6ca29fca77333ffedda481854d88d4b794832c7c214ebf4c820022
font_01_sfnt_off000063ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63CA 18992 bytes
SHA-256: c8ece8e41cb02cb390b78a7de8842534a538b51bc12e46e9414b78277a363219

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