Malicious PDF — malware analysis report

Static analysis result for SHA-256 09106286d63d4b2e…

MALICIOUS

PDF

46.2 KB Created: 2021-05-11 04:46:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e35373fa03fbe6827a318a497cd33ba3 SHA-1: f3b1c11c0f7641d20dd8a6c554907aad45f1af24 SHA-256: 09106286d63d4b2e54809d26167ebf2fa6ef27f18d3fcdb5be68305be8b97f12
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "free generator / game hack" content. The ML classifier also flagged this PDF as malicious. The embedded links likely serve as a lure to download further malicious content or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/robux-game-game-hack In PDF document text
    • https://www.manmed.info:443/images/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/roblox-a_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-reddit_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/apps-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-spin-blogspot_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free-coins-facebook_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/gameoffice-net-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/minecraft-handbook_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free-spin-app-iphone_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/robux-download_GM431946152.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_off00004804.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4804 26408 bytes
SHA-256: 6aa76e5c3ef36d01befba25a9dffa7d8fa1e893b4f10731bab515316a1feec9e
font_01_sfnt_off000084a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A9 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off000091bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91BB 18340 bytes
SHA-256: c3384937c05d12942e5ee2f32f048a43efe3336dc3e7ac7a8d2adf4ff389f548

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