Malicious PDF — malware analysis report

Static analysis result for SHA-256 637be23064d039fa…

MALICIOUS

PDF

42.5 KB Created: 2021-05-17 02:02:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4329e8749dce87ade19e7c0c69405841 SHA-1: 1fa8b3fd6642f4c7433a101841e6ab6ed2c9005c SHA-256: 637be23064d039fa74b54449b12723d8f1b573b142072dc9d711cf3be1a752e7
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and game hacks, directing users to a malicious URL. This URL is flagged as a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though partially corrupted, contains references to the lure and the malicious URL, reinforcing the attack pattern.

Machine Learning

  • Nyx PDF Classifier clean score 0.0125

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/how-to-get-free-robux-without-human-verification-game-hack In 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_003_off00003850.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3850 25976 bytes
SHA-256: d48b4ab70ca6b48dbf7228d25554af3f6ca40444df680884fe7bccf7d4851acf
font_01_sfnt_off000074f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74F0 3656 bytes
SHA-256: 63a179d8a9645bea05c6d53b1776faf4e4a7281930de6cf484e639846bec2e20
font_02_sfnt_off000081aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81AA 19388 bytes
SHA-256: c7994a70f951e7a274445218605a0e5dad46067da7d3a89c75279f94e76bcfde

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