Malicious PDF — malware analysis report

Static analysis result for SHA-256 741610e7a7a67b3a…

MALICIOUS

PDF

44.6 KB Created: 2021-05-17 04:04:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 61900ee66f835dddeb723c284b24efa3 SHA-1: 058816c2300cf096789d4926e0bede1b15afd6c5 SHA-256: 741610e7a7a67b3addf48bb74d605938f840da0fd12103d17ef8736b644ca731
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as 'free Robux' or 'game hack' generators. The primary lure URL is https://netcdn.xyz/app/431946152/free-robux-no-human-verification-or-survey-or-download-2021-game-hack. The document body and embedded links strongly suggest a social engineering tactic to trick users into downloading further malicious content.

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 https://netcdn.xyz/app/431946152/free-robux-no-human-verification-or-survey-or-download-2021-game-hack In PDF document text
    • http://knjiznica-oroslavje.hr/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-game-hack-link_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-app-free-download_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/roblox-svg-free_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/minecraft-dungeons-free-download-pc_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_003_off00004c50.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C50 26120 bytes
SHA-256: fae6ac06d1e856b65ec015cf45b844073108e9b12b3f7bfa5d6a90f4d438cf67
font_01_sfnt_off00008644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8644 20136 bytes
SHA-256: 66e5e50e12f5eb49621ab9bcd6ab85026409d616512a452c1eb3339dd9867554

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