Malicious PDF — malware analysis report

Static analysis result for SHA-256 b158540aa2bfcd79…

MALICIOUS

PDF

38.8 KB Created: 2021-05-23 08:42:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0d720add91c573416e5aa48af5190728 SHA-1: 0f2c1f118359cd1bda05492b10dc68ba4b505f73 SHA-256: b158540aa2bfcd792ee17c2904eebc93dc3b94ec653ecce90f50972b58cdfb7c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector leading to a 'free TikTok followers generator' lure. The document body also contains similar lures and directs users to click a button for access. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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/835599320/free-tiktok-followers-generator-game-hack In PDF document text
    • http://fengshui-shop.com.ua/images/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • http://fengshui-shop.com.ua/images/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://fengshui-shop.com.ua/images/free-tiktok-followers-and-likes_GM835599320.pdfIn PDF document text
    • http://fengshui-shop.com.ua/images/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://fengshui-shop.com.ua/images/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003855.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3855 29260 bytes
SHA-256: 54450ddda3976c9aa74c6767ec0cf6e2fa524afbf2aae738be52f031dbe432ca
font_01_sfnt_off000077a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77A8 17924 bytes
SHA-256: 15e81544c7296339f60406a70d440ba472803439c3c01f92585f07e7e66dad8a

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