Malicious PDF — malware analysis report

Static analysis result for SHA-256 af394e148ae4ebe2…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 07:04:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 32348b05c5ee4481be0b2195aa317e2b SHA-1: a5612bf8849ef3a68b5f7013860c1f8950b4504d SHA-256: af394e148ae4ebe2d7ca416bb89919359e095a85a37fabadf8ea13ff5683a77a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a malicious redirector link, specifically advertising 'free generator / game hack' content. The document body and embedded URLs reinforce this lure, directing users to a URL associated with known malicious infrastructure. This suggests the PDF is designed to trick users into visiting a malicious site, likely to download further malware or engage in phishing.

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/free-roblox-shirts-templates-game-hack In PDF document text
    • https://library.stikeswnpalu.ac.id/repository/hack-peoples-roblox-account_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-gang-rape_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-hack-2021-glitch_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-free-clothes-generator_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-pc-hacks-for-free_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/april-1st-hack-roblox-wiki_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/cheat-roblox-vehicle-simulator_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-free-robux-website-http-bitly-2gcisvw_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/its-free-roblox-logo_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/cheat-roblox-jailbreak-money-give_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/comment-activer-cheat-code-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-twitter-free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-hack-gui-script-pastebin_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-hair-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-website-robux_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_off0000306e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306E 21948 bytes
SHA-256: 406c40da532a3e4a173bc007ede7c30228a2c1c8b8c67a86f29ddffe32b94ee6
font_01_sfnt_off00006114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6114 19476 bytes
SHA-256: e022dfdfaf5969877872bfc7bdb5743867beaa2f529a87f7ccf368eea5ea03d6

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