Malicious PDF — malware analysis report

Static analysis result for SHA-256 0188b3b6d39c583e…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 21:30:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e26d6932cbebbde5032401cbfe89e251 SHA-1: 69f309aebf7c419e671b7b40c6ec55980a4c041b SHA-256: 0188b3b6d39c583edb9e36a93b89c1f2b844d0cc1e11c252262bf6fdde3d8173
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to a malicious redirector, specifically advertising 'free Robux' for the game Roblox. This lure is a common tactic to trick users into clicking malicious links. The ML classifier also flagged this PDF with high confidence. The primary IOC is the redirector URL, which likely serves as a gateway to further malicious content or downloads.

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/431946152/bloxpink-free-robux-game-hack In PDF document text
    • http://library.unissula.ac.id/fk/repository/free-roblox-spilen_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-anime-fighting-simulator-free-vip-server_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-get-free-roebucks-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-hack-elemental-battlegrounds-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/dragon-ball-rage-roblox-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/robux-survey_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/real-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-robux-free-roblox-glitch-2021-savagefrey_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-robux-hacks-no-verification_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_off00002f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F7E 22476 bytes
SHA-256: 466d4af7cd75c0331b62bda57746d6ce6a123ff679f5a63c642dd8f3cbb0c9e7
font_01_sfnt_off0000617d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617D 19256 bytes
SHA-256: d97c154dd0756c1bdfd61ea4bb40c4b75f721cb5311919f7d18a850d358a5c9c

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