Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b28f6ccd91b09cf…

MALICIOUS

PDF

36.1 KB Created: 2021-05-23 11:35:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5d7b073104502e31c3a36997d1a9f99a SHA-1: b1ee0e9ecd09896a6c34e87c0093d3da8d8eb92c SHA-256: 4b28f6ccd91b09cf3c502682727672b5c577bedfdf187f807ce17f86e71c503f
160 Risk Score

Malware Insights

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

The PDF document contains lures related to game hacks and free generators, directing users to a known malicious redirector. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. No scripts were extracted, but the document structure and embedded links suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/479516143/minecraft-free-computer-game-game-hack In PDF document text
    • http://domaizdereva24.ru/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://domaizdereva24.ru/images/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://domaizdereva24.ru/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://domaizdereva24.ru/images/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://domaizdereva24.ru/images/coin-master-daily-gifts_GM406889139.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000035ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35EA 24256 bytes
SHA-256: f75966154c583f3122ade698b901acc46cc2ae362c11ebf8b1c10b5ebcf1dfae
font_01_sfnt_off00006c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C02 18284 bytes
SHA-256: 652d84a18e1638f498f678590eda8b7b1302fb3a862e9e0847db70e42b725810

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