Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb74b9d3a4b254a2…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 11:05:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 179ee5ba84fe9f4cb30eec6ae79804a2 SHA-1: 2d8f9a40a14f81949419e9dddbbec1385e47679f SHA-256: bb74b9d3a4b254a24591de44170a04356603a98f96d7e1be6d0fb9dbadb5d97c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as game hack generators. The presence of a visual download button further encourages user interaction. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

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.tw/app/406889139/freespinandcoin-game-hack In PDF document text
    • http://stikespantirapih.ac.id/home/repository/mythical-chaos-robux-hack-v3-0_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-2021-november_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/robux-generator-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/se-puede-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/robux-page_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-free-robux-december-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-hack-pour-passer-a-travers-les-murs-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/inspect-element-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-robux-giver-tool-hack-tool-download_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-shinobi-story-cheats_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/robux-generator-free-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/adfly-free-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-cheat-in-roblox-jailbreak-fast-run_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-hack-mad-city-roblox_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_off0000334f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x334F 22792 bytes
SHA-256: ebdc17646907fb687379b1e2335cbfce7483688aafaa92bed95c24792dd050bd
font_01_sfnt_off00006642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6642 18244 bytes
SHA-256: 19494bed36003fadbe02431e250c62ef1698fa422030438aed600d934fd3a9e1

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