Malicious PDF — malware analysis report

Static analysis result for SHA-256 b692f544d5a94095…

MALICIOUS

PDF

35.3 KB Created: 2021-06-27 14:57:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 434b4f9b0aadcde2cb434b6e838fbeef SHA-1: 620c28af0a247ba53621f0ccacd11e96879c39d6 SHA-256: b692f544d5a9409520756c18fd173e542f5d1b0b360aa711ab7116e728d021b9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically http://netcdn.co/app/431946152/free-roblox-accounts-with-robux-2021-july-game-hack. The document body and heuristics indicate a lure for game-related cheats or currency, designed to trick users into clicking the malicious links. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/free-roblox-accounts-with-robux-2021-july-game-hack In PDF document text
    • http://library.ulb.ac.id/repository/roblox-cheat-menu-download_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-roblox-gift-cards-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-game-card-codes_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-free-iron-man_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-spins-23-march-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-co_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/robux-hack-sin-verificacion-humana_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/https-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-candy-script-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-robux-hack-mod-apk_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-no-tix_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_off0000303e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x303E 22324 bytes
SHA-256: dcbfd461c2986a70f0767974e594c40f840c00f1ef9a0779ea59fc9216a91074
font_01_sfnt_off000061b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B7 20128 bytes
SHA-256: 613e20c4aa1ae9fee56bc51833a5d395a1127a12027bd6ac8ff1f873005d5689

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