Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f577f78a34609cf…

MALICIOUS

PDF

39.2 KB Created: 2021-05-22 15:45:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 33634223ebf9aee8b6952649fdff7adf SHA-1: 2de7ab3587af7a4a28478a299ad6511dd2937e2f SHA-256: 6f577f78a34609cf5d36808434181baeb4f05b32e7a70884dd8cc5d879c6e45c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that redirect to malicious infrastructure, masquerading as game hacks and generators. The document body and heuristics indicate a lure to download potentially unwanted or malicious software. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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-download-windows-10-game-hack In PDF document text
    • https://admin.9credit.vn/data/files/hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/coin-master-apk_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/free-roblox-card_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/minecraft-that-you-can-play-for-free_GM479516143.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
stream_002_off00003263.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3263 25200 bytes
SHA-256: 94127743d6b5d11efa334a530e38dee9b47ad90a500e3de6a80ae7080ec977dd
font_01_sfnt_off00006c8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8F 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off0000762e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x762E 18764 bytes
SHA-256: 1024eac42dda9887ab3e6b3a3052baf0f02eb021d29d3096c75228bb34fedc86

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