Malicious PDF — malware analysis report

Static analysis result for SHA-256 efba6ab97dfba2ae…

MALICIOUS

PDF

40.1 KB Created: 2021-05-13 20:08:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 54f98ac24a54fd6fadfc7a3d9665fabb SHA-1: 71ca1ee6d716aff9518d8064af850b691a954241 SHA-256: efba6ab97dfba2ae4b00907fbbbb6b3eae28891839339fe9238181e46ce19158
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a redirector link, specifically targeting users with a lure related to game hacks and generators. The embedded URL, https://netcdn.xyz/app/431946152/where-to-get-robux-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the nature of the PDF and the redirector suggests an attempt to lead the user to a malicious site, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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/where-to-get-robux-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

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_003_off000031fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31FA 25796 bytes
SHA-256: bd29fd6bea5632221a422ffbb25bd36e907dc4c938f0f9dc208412a297068dea
font_01_sfnt_off00006de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE7 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00007af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF9 18316 bytes
SHA-256: 5d084a82250710db6b98a0dc3f702c66b679dd89c140e62c2649391066269139

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