Malicious PDF — malware analysis report

Static analysis result for SHA-256 b542bdffc73b4f7a…

MALICIOUS

PDF

41.4 KB Created: 2021-05-11 17:00:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7deabcf89bc87d761eb9f560ebcda873 SHA-1: 8e7756e12d6e882e19ba852b99140dd4dcd7925a SHA-256: b542bdffc73b4f7ac8051fc82faed063e0e0dabd168a61fe0fb71bfbdf91cbc6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting 'free game hacks' or currency. The primary lure appears to be a scam designed to trick users into visiting potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack.

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/free-robux-on-phone-game-hack In PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/send-me-500-2021-spins_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/roblox-survey-for-robux_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/hey-google-how-do-you-get-free-robux_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_off000046ad.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46AD 25300 bytes
SHA-256: 175ec2523a4c197484c3b7740d82e584fd052d686fea3cdfa511706581ff2ca9
font_01_sfnt_off00007f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6F 18332 bytes
SHA-256: a8c9403bd24fc6ffbb74b72c8864e8746fc5e9ab0f3a7e731dec7195ce2a3638

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