Malicious PDF — malware analysis report

Static analysis result for SHA-256 a691958bdb4dc880…

MALICIOUS

PDF

33.1 KB Created: 2021-06-18 07:29:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fc397438e6b9582d485805985b7aff3c SHA-1: c1b6db4daa44dc7bd4480489765a74afe5054e1c SHA-256: a691958bdb4dc8801a083f0279423fedfca537c42063716f6fd026cee9be62e9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a malicious domain, masquerading as a 'free generator / game hack'. The ML classifier strongly indicated maliciousness, and the heuristics confirm the use of a redirector to lure users. Although no scripts were explicitly extracted, the nature of the embedded links suggests a phishing or scam attempt, likely leading to further malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/cheater-robux-game-hack In PDF document text
    • http://digilibfisip.unla.ac.id/repository/get-free-item-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-daily-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/minecraft-education-free_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-roblox-catalog-buyer-bot_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/pokemon-go-free-money_GM1094591345.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-how-to-complete-heavy-metal-machines_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-app-store_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
font_00_sfnt_off00002cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CF0 21704 bytes
SHA-256: 11c735738684d65b64e4461f15b5858c984045b38ae8de9dedf86ae8b2f59602
font_01_sfnt_off00005cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD2 18820 bytes
SHA-256: 7348a4efac8c56bf88ace161d623c46fb90fc686a34d4d66220df9fa8a93e33a

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