Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7ba88689e88b22f…

MALICIOUS

PDF

37.0 KB Created: 2021-05-22 23:33:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7552e5f12b3dbc56a8941519979cf078 SHA-1: 4c4b423fd076635703276f15e3ed810324048e9f SHA-256: a7ba88689e88b22f9ae58675326fe1e7be5a63fef28ea3a7b8e964d8ef5019a2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links and a call-to-action phrase designed to trick users into believing they can obtain free in-game currency or hacks. These links redirect to known malicious infrastructure, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to potentially harmful sites.

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/431946152/free-robux-exe-game-hack In PDF document text
    • http://www.mostraining.co.za/images/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://www.mostraining.co.za/images/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.mostraining.co.za/images/coin-master-mod-apk-latest-version-free-download_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_off0000351c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x351C 25824 bytes
SHA-256: 8f7d9c26ac99a1184d0b303e7ceebf503e5d1f37bc7f28687c3cc2ed75773e39
font_01_sfnt_off00007057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7057 18012 bytes
SHA-256: 1e3fda203f08fe42ab00f6cef97e605bb68f7e374108f28afe3c353055d0c9d6

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