Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e7fa3f1cc6098d…

MALICIOUS

PDF

39.7 KB Created: 2021-05-21 17:06:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9babe816f5eb42fcb2a7ffd4e544c97c SHA-1: 5bca5d131cce7c908973576bb124a7410660fdc8 SHA-256: c0e7fa3f1cc6098df04603ec116eb5f66ef20d5e1296753dfa265173c148818e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting 'free Roblox codes' and 'game hacks'. The ML classifier also flagged the PDF as malicious. The document body, though partially corrupted, contains text related to these lures and the malicious URL. The presence of multiple links to potentially malicious domains suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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 https://netcdn.xyz/app/431946152/free-roblox-codes-game-hack In PDF document text
    • https://www.zagorjeadventureteam.hr/files/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/coin-master-hack-apk-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
stream_002_off00003415.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3415 29876 bytes
SHA-256: 8457ee2ead8442aa4b94f5be34171e7d5bddf551e1707b57a6763236e6e9efeb
font_01_sfnt_off00007a91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A91 18124 bytes
SHA-256: b2c67196fbf991b5753887bae8f4e8d608d4d3a0c15e6a0a5d408089f8491e43