Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfa7f9016cc4d2b3…

MALICIOUS

PDF

37.5 KB Created: 2021-05-21 01:42:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 02973a5facaf5060e44da685358ef23f SHA-1: ace071e889d245174927ee2855a2a8dd222c1731 SHA-256: bfa7f9016cc4d2b3df7975281ef304786eb92d9ccba1f05d147fc547d133ccac
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links and a call-to-action phrase designed to trick users into believing they can get free in-game currency. The primary link redirects to known malicious infrastructure, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lead the user to a malicious website, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/406889139/free-coin-master-spins-and-coins-game-hack In PDF document text
    • http://www.kcmconsulting.com.au/images/free-outfits-roblox_GM431946152.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • http://www.kcmconsulting.com.au/images/how-to-hack-coin-master-in-pc_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_off000035a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35A5 26280 bytes
SHA-256: 833aa28174d969cf0dd4311a5c334d798e20d3a70b14eb35bc51076a04928e1d
font_01_sfnt_off0000723d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x723D 18060 bytes
SHA-256: 55f53c4f18bfaf59a8fbb6d381f980c96a3f4ad908aa3278e43a985984e68094

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