Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc817e84a4db37d3…

MALICIOUS

PDF

34.4 KB Created: 2021-06-18 03:49:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: f081a10ab284202af8703395b554e12c SHA-1: 23fa7001e176c76277c3635f9c4fd92456ed4db5 SHA-256: cc817e84a4db37d345e5f2a5c65f7dcdf668f1d0fb6a6a63aae80704d01095db
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector at http://netcdn.co/app/431946152/is-there-actually-a-free-robux-hack-game-hack. The document body and extracted URLs suggest a lure related to game hacks and free Robux, a common phishing tactic. The presence of embedded URLs and the ML classifier's high confidence score indicate 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/is-there-actually-a-free-robux-hack-game-hack In PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/zeus-roblox-hack_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/roblox-skins-free-hack_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/my-friends-account-on-roblox-has-been-hacked_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-hack-roblox-with-inspect-element-2021_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/como-hackear-vehicle-simulator-roblox-para-tener-12000000_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/easy-boy-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-do-i-get-robux-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/roblox-gta-5-money-hack_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/synapse-x-free-roblox_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/roblox-hack-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-codes-for-boku-no-roblox_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/roblox-group-admin-hack_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-free-money-on-bloxburg-roblox_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/hack-roblox-tuto_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/roblox-cheats-for-money-xbox-one_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/roblox-cheat-script-auto-farm-super-power-training-simulator_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/roblox-teethyz-dentist-how-to-hack-through-the-hr-door_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-free-robux-hack-on-tablet_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
font_00_sfnt_off00002ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE3 22440 bytes
SHA-256: a36dfc8a7f77091b9e492da05744fed5e1bfbaf2049fe16dea147718e30ccf97
font_01_sfnt_off000060df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DF 19224 bytes
SHA-256: 35012143ead856135a460f63ccbe43b7cdccd00ac2e2ea5d17397942fc817182

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