Malicious PDF — malware analysis report

Static analysis result for SHA-256 86cada0b9c183192…

MALICIOUS

PDF

46.3 KB Created: 2021-05-14 02:35:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 462ae2082c0d9a82f5702c1b4d759212 SHA-1: f1179477f35a98fac2828c327038154a1f801e52 SHA-256: 86cada0b9c18319226659db6addc65d0f05b2652b11c4d331af4d256b9875c12
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as "free generator" or "game hack" lures. The primary redirector URL is https://netcdn.xyz/app/431946152/roblox-character-free-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to lead the user to a malicious website, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8696

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 https://netcdn.xyz/app/431946152/roblox-character-free-game-hack In PDF document text
    • http://lechia-sedziszow.pl/images/free-coin_GM406889139.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/hack-robux_GM431946152.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/minecraft-free-school_GM479516143.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004854.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4854 27828 bytes
SHA-256: d1defe1fda655d50342fa06f3ab2e911385d78a1de433af3d90138d425fce3c9
font_01_sfnt_off00008820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8820 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000920a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x920A 18448 bytes
SHA-256: 05a96a9ae39645995e15b2d168b0f8c4367af40f40b0e0a665e781c288f1fec7

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