Malicious PDF — malware analysis report

Static analysis result for SHA-256 535cc7f36cd8fe7e…

MALICIOUS

PDF

42.5 KB Created: 2021-04-28 20:58:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: af9fc956ab47b9fa8b712e36db0b205d SHA-1: 94bd756b1594af935376154e5eef57513c6ad974 SHA-256: 535cc7f36cd8fe7e29bf31f0954eee4880341dbe3646d0a699cde30f6898b290
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including one identified as a malicious redirector. The content and embedded URLs suggest a lure to obtain game-related benefits, likely leading to further malicious content or scams. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/can-you-get-robux-with-cheat-engine-game-hack In PDF document text
    • https://lib-stie.yai.ac.id/repository/free-roblox-girl-clothes.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-fly-hack-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-in-roblox-on-iphone.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/pastebin-robux-hack-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-no-survey-or-human-verification-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/bugmenot-roblox-hack.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/vehicle-tycoon-roblox-hack.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/hack-roblox-block-piece.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-free-clothes-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-health-cheat.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004309.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4309 27440 bytes
SHA-256: 752f5bb56ebe3c01e25b7f1c48cb8f693278a8214d71be5e481c61a7424b81dc
font_01_sfnt_off000081e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E9 19116 bytes
SHA-256: 7e2e958cffc418aac3152686c96d6267449a379bc423f524a03f22a97ae2ea5d

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