Malicious PDF — malware analysis report

Static analysis result for SHA-256 c46b8d775de0b1f9…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 20:48:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f64869862ff59a47f8de00ada3ef2f60 SHA-1: ec2d7be29f5d7fe0119ae477ce7744a5dac11b81 SHA-256: c46b8d775de0b1f90229c5dfd5b1f36dddf8dab7721e8e0a48c9824fbb9ee42b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appears to be a game hack or generator. The primary link, http://netcdn.tw/app/431946152/roblox-free-robux-website-game-hack, is identified as a malicious redirector. The document body and heuristics indicate a social engineering tactic to trick users into visiting potentially harmful websites, likely for credential harvesting or further malware delivery.

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/roblox-free-robux-website-game-hack In PDF document text
    • https://sensorcamera-tw.com/upload/files/pubg-uc-low-price_GM1330123889.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-hack-app_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/robux-miner_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-roblox-accounts-2021-september_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/comment-avoir-un-cheat-sur-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/june-29-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/letra-de-hacker-roblox_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-prison-life-v2-0-cheats_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/can-you-get-arested-for-having-a-roblox-hacker-group_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/street-kings-roblox-hack_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-stolen-roblox-games-download_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-legit-free-robux_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-get-free-robux-on-roblox-without-human-verification_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-get-free-robux-by-doing-nothing_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_off00002e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E5C 22576 bytes
SHA-256: 65bcad4c9db5b7529e9d19e0eb2d2587c36953f974ac094ec050a5d5569c4332
font_01_sfnt_off00006049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6049 19212 bytes
SHA-256: 4b1e8e9c88347b3f29ea09d9c43ed0e523ec5f5ba27152f0fbcfe198ff1f6a17

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