Malicious PDF — malware analysis report

Static analysis result for SHA-256 38332b50c51e0ff4…

MALICIOUS

PDF

36.1 KB Created: 2021-06-18 20:08:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ed420ee94cbad3e6d6b358a2b3d34541 SHA-1: e59171e57bab3f3eaba918b66abb2542c6d48e5b SHA-256: 38332b50c51e0ff413d76281678961b3d940044b9597c5c730c9ce11bbf54e7c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector, disguised as a 'free generator' or 'game hack'. The document body and heuristics indicate a lure for potentially unwanted software or further malicious redirection. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/hoq-to-buy-anything-from-catalog-for-free-roblox-game-hack In PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/hack-roblox-pastebin-gui_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-card-codes-generator-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-card-link-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/video-hacker-roblox-francais_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-robux-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-hack-strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-free-play-as-guest_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-tool-without-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-hack-download-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-online-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/hack-para-roblox-mathdrive_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-online-2021_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
font_00_sfnt_off0000348b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x348B 22328 bytes
SHA-256: dd23dae2a19de5c862cef6f5f34b50e2bb283712cda7bb483291e2d025a3f247
font_01_sfnt_off0000664f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x664F 19788 bytes
SHA-256: 20a2b4d7ad7d583d8c1bd456de8d52e479ae5748934176b5bf11becd34ae646b

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