Malicious PDF — malware analysis report

Static analysis result for SHA-256 e91c68314bccbd6b…

MALICIOUS

PDF

40.5 KB Created: 2021-04-27 08:03:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 769ef92ba6869c54dee1521b652f799d SHA-1: f6f94a932f568bf0882c406814fac31914bfa193 SHA-256: e91c68314bccbd6b146157ea182ee0a6593f38d0c9d7dfa94dbf90664bae9bac
208 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to websites that are advertised as game hacks or generators, specifically targeting popular games like Roblox. These links are identified as malicious redirectors, indicating a likely attempt to lead users to phishing sites or download further malicious content. The presence of 'cmd-robux-hack-real.pdf' and similar filenames suggests a social engineering pretext to trick users into downloading or visiting malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 6

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/how-to-get-a-free-dominus-in-roblox-2021-march-game-hack In PDF document text
    • https://lib.stie-yai.ac.id/repository/adopt-me-roblox-money-hack-2021.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-every-month.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/gun-hacks-for-roblox-2021.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/cmd-robux-hack-real.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/hacking-engine-for-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-roblox-character-codes.pdfIn macro / runtime command snippet
    • https://lib.stie-yai.ac.id/repository/new-roblox-free-faces.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/bleu-roblox-hack-key.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-roblox-real.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-hack-an-roblox-account-2021.pdfIn PDF document text
    • https://robux-rank.comIn PDF document text
    • https://lib.stie-yai.ac.id/repositorIn macro / runtime command snippet
    • 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_off00003f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F97 24516 bytes
SHA-256: d19425f7ed11ead148718ffe4367cc55e19eba2222af2bd113a4f6de13d16d51
font_01_sfnt_off000077d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77D6 19896 bytes
SHA-256: 7da7ed1a8ded076576580d29acd517b89ce6add000315966fcc14653e4a4c93c

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