Malicious PDF — malware analysis report

Static analysis result for SHA-256 5982a2ca0f0211de…

MALICIOUS

PDF

42.0 KB Created: 2021-05-10 13:38:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b0445a53404c8f5ddff5623f71cccda4 SHA-1: 5856baa842e9cb3c709e6c55ef8e84dd4e6d4d25 SHA-256: 5982a2ca0f0211deaae2ad26ad96c69514a1a95a12c1c5451990109b534bbd30
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links, specifically targeting users with lures related to game hacks and virtual currency. The embedded URLs point to known malicious infrastructure designed to redirect users to potentially harmful sites. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8902

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/robux-hack-2021-game-hack In PDF document text
    • http://vcelarskepotreby.org/images/free-draw-roblox_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/robux-free-online_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/coin-master-daily-free-spins-blog_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/roblox-avatar-free_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
font_00_sfnt_off00003700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3700 26688 bytes
SHA-256: 7370d9669e6f2002c626320be0b9057e8e198e126a2ba9f45be1188b0833c82b
font_01_sfnt_off00007468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7468 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off0000810f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x810F 18648 bytes
SHA-256: 960613bb0fa4c19a2503237e067522a4d484b1b5f3e7387dbdf2c2d9282ca05f

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