Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb764784219f9bf4…

MALICIOUS

PDF

34.7 KB Created: 2021-05-22 13:35:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7ad2df3c19382e833bc41946ec125c69 SHA-1: 093acb4eaddcebd89c1e9459fbfea4c7f7aa512c SHA-256: bb764784219f9bf4096b621d1f95b1a3adfdc655f27c8b52bcc0a3df3676dc39
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, including one explicitly flagged as malicious. The document body also contains a call-to-action phrase and a URL that appears to be the primary lure. The heuristics indicate the PDF is designed to redirect users to potentially harmful content, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/835599320/free-tiktok-video-game-hack In PDF document text
    • http://sauer-umweltservice.de/images/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • http://sauer-umweltservice.de/images/hacks-roblox_GM431946152.pdfIn PDF document text
    • http://sauer-umweltservice.de/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://sauer-umweltservice.de/images/how-do-i-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://sauer-umweltservice.de/images/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003094.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3094 24148 bytes
SHA-256: 4c186c85a4304401c7beafd6b645ed9fa696214c21eaf14751dca845ddfdcf3c
font_01_sfnt_off000067d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67D3 17764 bytes
SHA-256: 235ab7ad76fbd6febe16a9da060cefd2b4630fdfb887c9c84e88c01a352496ee

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