Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3dc65d69c2b6293…

MALICIOUS

PDF

39.8 KB Created: 2021-05-23 06:34:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0c721ee9dcd3f0138468c5ac4239b9ce SHA-1: 56e1cee3aac069989c993ff7c854febcf9438279 SHA-256: b3dc65d69c2b62930c368104cf708287f85fcf2187dbb874416273ecce21a27d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and text lures related to 'free Robux codes' and 'game hacks', aiming to trick users into clicking. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-robux-codes-2021-not-used-game-hack, which is flagged as a malicious redirector. The document body also contains several other URLs pointing to potentially malicious PDF files hosted on montchanintt.fr, suggesting a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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-robux-codes-2021-not-used-game-hack In PDF document text
    • http://montchanintt.fr/images/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://montchanintt.fr/images/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://montchanintt.fr/images/free-robux-please_GM431946152.pdfIn PDF document text
    • http://montchanintt.fr/images/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://montchanintt.fr/images/how-to-earn-robux-fast_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000336e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x336E 25380 bytes
SHA-256: 4b499a39d2dc27b698900f29448d91d4933fcc25acf6fffc2b5bb8b1a8bf8427
font_01_sfnt_off00006e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E78 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00007827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7827 18880 bytes
SHA-256: 342a41804753b243bf13fa7c19db71c7debbb8fa80f4750c82899b0ccf7aa343

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