Malicious PDF — malware analysis report

Static analysis result for SHA-256 925bd84ac2951966…

MALICIOUS

PDF

48.4 KB Created: 2021-06-11 10:03:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1ad248a7021bc74f1da38054bb095a20 SHA-1: 3849148b9626e8bfddcee9b2a1203b1a7aa37f7d SHA-256: 925bd84ac2951966b3a8eb5551c8e140c4b6e663cfcf10f1693ac134ca78ad5d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' for popular games. The document body and heuristics indicate a lure designed to entice users to click these links, which likely lead to further malicious content or downloads. No scripts were extracted, but the presence of malicious links and the lure strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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.tw/app/431946152/roblox-mad-city-hack-2021-game-hack In PDF document text
    • https://dirigentigiustizia.it/images/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/tiktok-free-open_GM835599320.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/what-is-a-robux_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/hacks-to-get-robux-roblox_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-robux-no-survey_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
stream_004_off00004f29.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F29 32900 bytes
SHA-256: 28b909b2c820170447a03394c71746d31e74f752ba594258e85bf3ac3fa38598
font_01_sfnt_off000097a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97A2 19360 bytes
SHA-256: 558662f322661b43d713c00bb08b10bca49a156111320cf63cfc1f760a1cc82f