Malicious PDF — malware analysis report

Static analysis result for SHA-256 58f2c0631bf5011d…

MALICIOUS

PDF

35.2 KB Created: 2021-05-21 00:54:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 74cc53a67aecac74bd2e3812ff0a7175 SHA-1: c67611da5b25e652f6a9e4fc5754a2f1abe0e4f9 SHA-256: 58f2c0631bf5011dc77dcf41fc01ac73e11bdba255c61ed4a87d6a0f2a782e81
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links and embedded content designed to trick the user into believing they can obtain game hacks or generators. The primary malicious link redirects to known malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and heuristics indicate a malicious redirector lure, likely intended to lead the user to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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-fans-on-tiktok-game-hack In PDF document text
    • http://www.visiblefilm.com/images/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/get-robux-today_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/is-there-any-tricks-or-working-hacks-for-coin-master_GM406889139.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_off0000308f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x308F 25212 bytes
SHA-256: 0250a3f39d055de9c7581d6cab3dbf57cbe01474dd53c0af189cdd68385fb14a
font_01_sfnt_off000069d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69D3 17684 bytes
SHA-256: c4bad94708efb6699dc1c2f19668affdeb9abfa27890915707a4ba319d25bbbf

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