Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8bde1170a8ef7d7…

MALICIOUS

PDF

34.1 KB Created: 2021-06-19 05:02:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0e4cb32496952dd0e55def9b3e5cd060 SHA-1: 3ac02f03e21ec70d97351cb487229236ac1842e2 SHA-256: a8bde1170a8ef7d77a5e1850912a47316d65525319cb210e0f999701d33a0e2f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or scam attempt. The embedded URLs, such as http://netcdn.co/app/431946152/roblox-creeper-chaos-hack-game-hack, are designed to trick users into downloading potentially malicious files or visiting phishing sites. The ML classifier also strongly indicated maliciousness.

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.co/app/431946152/roblox-creeper-chaos-hack-game-hack In PDF document text
    • http://www.pspmrsmkber.com/opac/repository/how-to-change-your-roblox-name-for-free-working-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coin-master-32-android-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/husky-800m-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/roblox-robux-and-tix-hack-rtm-tool_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/pubg-800-uc_GM1330123889.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/build-roblox-bloxburg-mansion-for-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/minecraft-java-account-free_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/hack-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-twitter-codes-for-assasian-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-robux-no-download-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/roblox-studio-mac-download-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 4

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
font_00_sfnt_off00002f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F78 22168 bytes
SHA-256: 8d1a018c1a4c337de0419c5b9f795cc4ae16d35e26f05b1a5986a49a8c473a3e
font_01_sfnt_off0000605a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x605A 19000 bytes
SHA-256: e0ac41fb0a7676c3687df69ce13556dae2008e159b9e70de7fab68faed8fe379

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