Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bb5b0bf0f2c4433…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 19:49:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 85217b3d990c69991ff1fd9d72dbfc0f SHA-1: a63fff76265ffa4bb0f5d499de6d436dc7ebf92b SHA-256: 8bb5b0bf0f2c44333155cfeca44f07927b9dc985c6b0d514f1d6e1f7fe64ebf5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including a critical one to a known malicious redirector at http://netcdn.tw/app/431946152/how-to-hack-people-in-roblox-game-hack. This redirector likely serves as a lure for game-related cheats, aiming to trick users into downloading further malware or visiting phishing sites. The ML classifier also flagged this PDF with high confidence.

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.tw/app/431946152/how-to-hack-people-in-roblox-game-hack In PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-get-free-robux-on-phone-no-download_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-roblox-coloring_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/inappropriate-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/coin-master-hack-apk-latest-version-2021_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-dope-characters-roblox_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/bloxland-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/hacker-pants-roblox_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-money-cheat-2021_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-diamonds-coin-master_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-2021-hacked-game_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-free-emotes-list_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-speed-hack-2021-new-code_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-strucid-aimbot-hack-2021-august_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/best-roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/coin-master-free-spins_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_off00003032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3032 21844 bytes
SHA-256: ce3ee2e00264d001a35f6247e19898aab5cf42fbc5b072dc7a94ebba3836b62c
font_01_sfnt_off00006007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6007 19148 bytes
SHA-256: 210a0ca19f3049b49adbbe174b6d1900b8bba92406d0cafcc0c0c398ed60933b

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