Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e4bce32aeccee86…

MALICIOUS

PDF

35.3 KB Created: 2021-07-06 12:12:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c06bb470b0c7b6890f6767935d14bb19 SHA-1: ac4954afcc631bca5ab45b32ad0c440204aa85c3 SHA-256: 6e4bce32aeccee8651cb15855743a726e95f77140929d3de36c1483962f791e5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to known malicious redirector infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure related to 'game hacks' and 'free generators', which is a common social engineering tactic. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be directing users to malicious URLs.

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/835599320/what-tiktok-free-like-game-hack In PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-crack-free-robux-robuxmaniac_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/hack-roblox-jailbreak-2021-mega_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-robux-without-human-verification-for-kids_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-exploits-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/secret-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-and-tickets-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/gun-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/auto-click-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/denisdaily-exposing-a-roblox-hacker-wild-revolvers_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/without-pokemon-go-free-pokeballs_GM1094591345.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/snippet-hack-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000353f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x353F 22576 bytes
SHA-256: 8f4dde988e5217a743fe88deade77d7025c45d0e6d41320ac379e90cdf20a750
font_01_sfnt_off00006768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6768 18336 bytes
SHA-256: 453ebfe15a0bb9fa972ed4549b967f40d346d68a1dab48de1ac4ad20d5522c27

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