Malicious PDF — malware analysis report

Static analysis result for SHA-256 5824621246d9e885…

MALICIOUS

PDF

41.2 KB Created: 2021-05-20 13:33:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 00fd6b024f3256c151e0b6e12c4be860 SHA-1: 6192d945146b8f407a374c89bf221bdf39df6a52 SHA-256: 5824621246d9e885a12db5e5c268ad553374e768564a4b212e1b7fa054aa4af8
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple lures, including a 'free generator / game hack' link that redirects to known malicious infrastructure. It also instructs the user to copy and paste content into a shell, indicating an attempt to execute commands. The document body and embedded URLs suggest a phishing or scam attempt related to game cheats or virtual currency.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7471

Heuristics 7

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/479516143/minecraft-net-download-free-game-hack In PDF document text
    • http://pustaka.fk.unand.ac.id/repository/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000035ba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35BA 28824 bytes
SHA-256: ca08743653541cc90462a9155af7ce98b524929c5ee44b56e18a2bf4316ffac0
font_01_sfnt_off000075e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75E4 2892 bytes
SHA-256: c2578a292634a901613c1dd9f9883dd4930e6811e59ae03d696f263e56ea17b4
font_02_sfnt_off00007fce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FCE 18292 bytes
SHA-256: 496601abebed6a966dbf1b847dcb2b1aed243a9da0268eb4d87cd87739f421d3

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