Malicious PDF — malware analysis report

Static analysis result for SHA-256 72a0f610c5decc58…

MALICIOUS

PDF

35.9 KB Created: 2021-05-23 13:22:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 8c3a7257809a1aaaf911375acd6a952f SHA-1: f258b20a1b8c32d4ebbc3efd3b84e4c2780009a4 SHA-256: 72a0f610c5decc58c168d30c6eed5057ae1c9879bdfffaf6704f0fe6cbd9e5c3
200 Risk Score

Malware Insights

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

The PDF document contains multiple links to malicious redirectors and is designed to lure users with promises of game hacks or generators, presented via a fake CAPTCHA. The ML classifier also flagged this PDF as malicious. The embedded links likely lead to further malicious content or exploit kits, and the document's structure suggests it's intended as a phishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/robux-free-co-game-hack In PDF document text
    • http://bgnails.nl/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-get-free-skins-in-minecraft_GM479516143.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_off0000323a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x323A 24988 bytes
SHA-256: 2d47fa7be8aa6f9f16e93cfa2761aaffdaaf8851987cc7d871feb387e77d3e47
font_01_sfnt_off00006be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE3 18012 bytes
SHA-256: 3f1ded8a9c51e4f0f41c660fd84d3573ebe8f92a83837bcaa523a9614d650e73

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