Malicious PDF — malware analysis report

Static analysis result for SHA-256 def36f8e42015bda…

MALICIOUS

PDF

44.3 KB Created: 2021-06-04 04:33:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5051b2fd4be85b3dac684dd6c52986f4 SHA-1: b6819508b08dc9b06466e6cf371f91ba866c210e SHA-256: def36f8e42015bdad84abc54b76b2de9850b3691dc581547e291793d086ef359
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The document body, though partially corrupted, contains a URL that matches the malicious redirector found by heuristics. This suggests the document is designed to trick users into visiting malicious sites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/479516143/how-to-create-a-minecraft-server-for-free-game-hack In PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/spin-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/pubg-uc-at-cheap-price_GM1330123889.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-admin-free-spins_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/coin-master-pc-hack_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/minecraft-hacked-client-18_GM479516143.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
stream_004_off000052cd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52CD 25288 bytes
SHA-256: b694d465be07a0925e2c3194030577edd5ebf9ccf9f4ed21019e00d4d81cabe7
font_01_sfnt_off00008b64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B64 17988 bytes
SHA-256: 060fb71443e6007603a371ac142d4c0d51e0ba8cefae348522c79638c30c3a2b

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