Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bb0d47e1539a350…

MALICIOUS

PDF

36.9 KB Created: 2021-07-04 23:22:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c7b3a0b38248bf3184debab23778870e SHA-1: 63b8974c009451dfdd421ccfddacb06a62924a99 SHA-256: 1bb0d47e1539a350d0628813b8233bbaa14ca8f46da0f8426b63ed3d3424a7b2
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users to external websites, with a primary link pointing to a known malicious redirector. The document body and extracted URLs suggest a theme of 'free generators' or 'hacks' for games, a common lure for phishing or malware distribution. The presence of multiple links to a domain hosting numerous PDF files, many with numeric slugs, indicates a link farm likely used for SEO poisoning to attract victims.

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/games-on-roblox-that-give-you-free-robux-game-hack In PDF document text
    • http://perpustakaanlia.net/katalog/repository/free-wings-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/free-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/pastebin-robux-hack-v6-5-mythical-chaos_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/free-roblox-games-to-download_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/hack-de-roblox-bee-simulator_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/flamingo-free-draw-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/roblox-cheats-november-2021-dll_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/how-do-i-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/dragon-ball-z-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/the-app-that-gives-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/free-robux-with-fake-credit-card_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/free-tiktok-likes-and-followers_GM835599320.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_off00003611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3611 23196 bytes
SHA-256: 3613120bc3ace0e0bec1ee64c6bcde86a429009c35b6dbeaae319f16b736db00
font_01_sfnt_off00006991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6991 19716 bytes
SHA-256: 3217d2b45e6aba390097db31ed4f489c97a69b2175e2ab7441deb7edbbce2f2f

Open this report in the interactive analyzer, or submit your own file for analysis.