Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f74b3c402dd88ee…

MALICIOUS

PDF

42.6 KB Created: 2021-05-10 11:51:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: fada7a1e2a68f95a34d95cc43d6d3959 SHA-1: ea681c770965f36e10156229e64b3028a0488eb6 SHA-256: 1f74b3c402dd88eef599313e9262a1d26572f71df9dcb08a1b781e5dde95eb17
170 Risk Score

Malware Insights

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

The PDF document contains a lure related to game hacks and directs users to click a link. This link, 'https://netcdn.xyz/app/479516143/how-to-make-your-own-minecraft-pe-server-for-free-game-hack', is flagged as malicious and part of a redirector infrastructure. The document also contains instructions consistent with ClickFix attacks, suggesting the user should execute a command, which is a common method to bypass macro restrictions and execute further malicious actions.

Machine Learning

  • Nyx PDF Classifier clean score 0.0118

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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/479516143/how-to-make-your-own-minecraft-pe-server-for-free-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003605.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3605 25256 bytes
SHA-256: 538871f10a7b24e5af75a5a9b7720eee1229f600dd56899e44db387cf05968e7
font_01_sfnt_off00006f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5F 3020 bytes
SHA-256: f1a29adcea636583330be8db4f6466410de551ac48576b9e1aa5c34e2d665a1f
font_02_sfnt_off000079b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79B3 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_03_sfnt_off000083c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C3 18616 bytes
SHA-256: 7f1ed811d94b63e364c058ff1b231f2e8228461263d94dfafa7c0dfe2cf4e047

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