Malicious PDF — malware analysis report

Static analysis result for SHA-256 daeae6d5b0e26ad7…

MALICIOUS

PDF

42.2 KB Created: 2021-05-13 19:33:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8483257c35f71a10d142f69b4a6d16fb SHA-1: b3000cd77349d00b8203fbfa08022f79c8462a8d SHA-256: daeae6d5b0e26ad7a71d605aa04a7110fd2bb036ffb4a4de08768f68b3e4d94f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary malicious link directs users to `https://netcdn.xyz/app/431946152/how-to-use-scripts-in-roblox-hack-game-hack`, which is flagged as a known malicious redirector. This suggests the document's purpose is to trick users into visiting malicious sites, likely for further malware delivery or phishing. No scripts were extracted, but the presence of embedded URLs and the lure content strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/how-to-use-scripts-in-roblox-hack-game-hack In PDF document text
    • http://www.msts.ac.th/UserFiles/File/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/roblox-weird_GM431946152.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/how-to-hack-m-coins-mcpe-master_GM406889139.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/coin-master-app-for-free-spins_GM406889139.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/coin-master-hacks-no-downloading_GM406889139.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/free-robux-generator-for-kids_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_003_off00004840.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4840 24792 bytes
SHA-256: 085d084dc6846d952bb0789b9a8a4e2b06ef02c7ca54844172a17a97943e8285
font_01_sfnt_off0000809a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x809A 18932 bytes
SHA-256: fce9e652f89a1af62f774ff2b7937cf54d78de2903c3939778e1916a8682391a

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