Malicious PDF — malware analysis report

Static analysis result for SHA-256 251b1e3316edfb45…

MALICIOUS

PDF

48.1 KB Created: 2021-06-11 13:13:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6112b3e63d4b9b01be1d7ce9352816c6 SHA-1: a83adc8099c2bb954f8e2cfcb2704593bd59dd08 SHA-256: 251b1e3316edfb45be5d785181f7b7a566c24fc86c20229acfc360e2f267e120
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for free game hacks, specifically targeting Roblox players. It contains multiple embedded URLs that redirect to malicious infrastructure, likely serving as a downloader or further phishing page. The ML classifier and critical heuristic firings strongly indicate malicious intent, with the primary goal being to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/free-roblox-transmitter-generator-game-hack In PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/roblox-script-hack-download_GM431946152.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/money-cheats-for-roblox-vehicle-simulator_GM431946152.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/john-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/roblox-hack-robux-infinito-download-pc_GM431946152.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/hack-para-ro-ghoul-roblox-2021-rc_GM431946152.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/citizen-roblox-hacking_GM431946152.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/how-to-get-free-tickets-and-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/ninja-roblox-free_GM431946152.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/how-can-i-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/where-to-find-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/free-pink-hair-roblox_GM431946152.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/how-to-hack-someones-roblox-account-with-link_GM431946152.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/aimbot-hack-in-roblox_GM431946152.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/www-free-robux_GM431946152.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/roblox-free-not-blocked_GM431946152.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/robux-hack-codes-2021_GM431946152.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/roblox-pants-black-free_GM431946152.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/roblox-limiteds-for-free_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52CC 24756 bytes
SHA-256: 81b074a4f96116b6389638a143bc21cd2e350e39da25cf7ec25959b54b9e70cf
font_01_sfnt_off00008b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B33 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9845 18660 bytes
SHA-256: bc8beb7c2a700f08045c4470ef506b7813ec9e70559e8ddc9ffc4b08abadd44e

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