Malicious PDF — malware analysis report

Static analysis result for SHA-256 411ab54bb6f7384a…

MALICIOUS

PDF

33.5 KB Created: 2021-06-28 05:54:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: eff08ea46f75ac9487d1d567f3c0bf9e SHA-1: 3590c6eed81c9e1b1e6abed8a67d9b389e12cd3b SHA-256: 411ab54bb6f7384a22e6d75d001f2511cac9ff9f416f8a038a0fae96c8e229d4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with one prominently identified as a malicious redirector leading to a 'game hack' lure. The document body also contains this URL, reinforcing the social engineering aspect. The presence of a visual download button heuristic further supports the lure tactic. No scripts were extracted, but the primary function appears to be redirecting users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/cheats-for-rocitizens-on-roblox-game-hack In PDF document text
    • https://kinderdam.nl/images/minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://kinderdam.nl/images/free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://kinderdam.nl/images/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • https://kinderdam.nl/images/roblox-bee-hive-simulator-how-to-get-a-free-egg_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • https://kinderdam.nl/images/free-download-roblox-for-android-phone_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/roblox-free-clothes-hack-2021_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/how-to-hack-roblox-jailbreak-money_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/free-roblox-for-roblox_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/roblox-com-hack_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • https://kinderdam.nl/images/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • https://kinderdam.nl/images/hacks-para-roblox-counter-blox-roblox-offensive_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/hack-para-unique-case-clicker-giveaway-at-600-likes-roblox_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/trigon-download-roblox-hack_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/roblox-cheat-engine-gravity_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/minecraft-marketplace-free_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
font_00_sfnt_off00002d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D32 22008 bytes
SHA-256: cf51f110d9d59ae74e3f01303f804e28794b7422ca68e4ef9faa4a8456a8fdec
font_01_sfnt_off00005d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D81 19124 bytes
SHA-256: b4196c45c40ed92c38a67e3449f8cd88fa65458123b64617801c72d97fe21486

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