Malicious PDF — malware analysis report

Static analysis result for SHA-256 85ab97784dc0143a…

MALICIOUS

PDF

43.4 KB Created: 2021-05-13 12:30:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0df70e7a0a57e93c78aa1f3636bc63ca SHA-1: 2914062f599e603cd2eccd8bcd1a2913868567fa SHA-256: 85ab97784dc0143a5a76375e7a30ac5dd72472332479435c6bdc5dc02f563e40
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and lures users with promises of free game currency and hacks. The embedded URLs, such as 'https://netcdn.xyz/app/431946152/free-robux-only-1-step-game-hack', are designed to lead users to potentially harmful websites. The document's content and structure strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/free-robux-only-1-step-game-hack In PDF document text
    • https://www.stileadda.com/uploaded_files/userfiles/files/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • https://www.stileadda.com/uploaded_files/userfiles/files/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.stileadda.com/uploaded_files/userfiles/files/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.stileadda.com/uploaded_files/userfiles/files/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.stileadda.com/uploaded_files/userfiles/files/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • https://www.stileadda.com/uploaded_files/userfiles/files/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • https://www.stileadda.com/uploaded_files/userfiles/files/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • https://www.stileadda.com/uploaded_files/userfiles/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.stileadda.com/uploaded_files/userfiles/files/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • https://www.stileadda.com/uploaded_files/userfiles/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.stileadda.com/uploaded_files/userfiles/files/getrobux-come_GM431946152.pdfIn PDF document text
    • https://www.stileadda.com/uploaded_files/userfiles/files/give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://www.stileadda.com/uploaded_files/userfiles/files/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • https://www.stileadda.com/uploaded_files/userfiles/files/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • https://www.stileadda.com/uploaded_files/userfiles/files/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.stileadda.com/uploaded_files/userfiles/files/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://www.stileadda.com/uploaded_files/userfiles/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • https://www.stileadda.com/uploaded_files/userfiles/files/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • https://www.stileadda.com/uploaded_files/userfiles/files/free-promo-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.stileadda.com/uploaded_files/userfiles/files/coin-master-free-spins-save_GM406889139.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_off00004ca3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CA3 24968 bytes
SHA-256: bf8c4178f452917f1b5ec2611f58f85a0534bfa94213f4589cbd480b37bbca3b
font_01_sfnt_off00008606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8606 18656 bytes
SHA-256: 070bf31dcf9002553526675ed1cd7b39f0747279791c235f0424fbc506b236c5

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