Malicious PDF — malware analysis report

Static analysis result for SHA-256 acbf47c0fa6007b2…

MALICIOUS

PDF

40.1 KB Created: 2021-05-25 07:04:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 2cdf398bfb35c5611b5617ff744d5da5 SHA-1: 790d73fb10514cbbf7cc6aa2392a51dc6d916232 SHA-256: acbf47c0fa6007b2dfceaf934b52d676ee89df7f6af6cfb4d8416df60107730d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to known malicious redirector infrastructure, specifically advertising "free generators" and "game hacks" for popular games like Roblox. The ML classifier also flagged the document as malicious. The embedded links likely lead to phishing pages or download sites for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8010

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/roblox-password-hacker-game-hack In PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/avatar-the-last-airbender-roblox_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coinmaster-com_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/google-moon-active_GM406889139.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_off000032a3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32A3 26464 bytes
SHA-256: 152cc83c796c7738fcefa0bc98a1cd05904365ae098bfde55191114473700dde
font_01_sfnt_off00007059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7059 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off00007a1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1A 18672 bytes
SHA-256: 2bdb07dac700063222d9705cc7006270fda87721bb9ffc7ab205fe7d4072a16f

Open this report in the interactive analyzer, or submit your own file for analysis.