Malicious PDF — malware analysis report

Static analysis result for SHA-256 c30fb596b356705c…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 14:36:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 858faf1cd3f327f4e7fc42b8a73b8975 SHA-1: 240659cb2998f47a8789e708f193fddef75a89c1 SHA-256: c30fb596b356705c60c753aaaeaba414b80f884937ed597d1afd4fb64a48a1c8
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are hosted on domains associated with malicious redirectors and SEO link farms. The document body and extracted links suggest a lure for users seeking game hacks or cheats, specifically for Roblox. The primary URL http://netcdn.tw/app/431946152/roblox-exploit-download-game-hack is identified as a malicious redirector, likely serving as a gateway to malware or further phishing content.

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/roblox-exploit-download-game-hack In PDF document text
    • http://katalog.ireyogya.org/repository/roblox-cheat-engine-64-speed-hack_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/is-jailbreak-detection-proxo-hack-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-hacking-system-download_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/como-tener-ropa-gratis-en-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-free-roubox-in-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-aimbot-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/aux-s-roblox-hack-pack-v2zip_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-generator-2021-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-fly-in-roblox-using-cheat-engine_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/level-coin_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-exe_GM431946152.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_off0000304a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304A 21664 bytes
SHA-256: 15e3f6a6c68b17e5b557605d0724da24fa16ed4c2371dfba54d2fdc89124e98f
font_01_sfnt_off00005fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FED 19392 bytes
SHA-256: 222653fb6e77f57885132882620f81ded5cfebf97e881e1f0191fa7fa6f2d083

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