Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc643a3dc653b87…

MALICIOUS

PDF

35.6 KB Created: 2021-06-29 07:18:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 4cbfda348e8c79da77aef0bf897a83d6 SHA-1: 0a50e2bc2a23264862e5649eecf068f140a91a45 SHA-256: fbc643a3dc653b878505ac8abbc0f745789fc2fbc78f292d6731afc861561f8e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector, disguised as a 'free generator / game hack' lure for Roblox. The document body and extracted URLs strongly suggest a phishing attempt to trick users into visiting malicious sites, likely for credential harvesting or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/how-to-hack-in-roblox-assassin-2021-febuary-game-hack In PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/cheat-roblox-blood-moon_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/how-to-hack-other-peoples-invertorys-on-roblox-adopt-me_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/get-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/free-roblox-cards-pin-number-2021_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/cheat-roblox-quick-scope-simulator_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/roblox-hacks-trail_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/download-game-roblox-pc-free_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/free-roblox-exploit-lua-script-executor-free-no-virus-please_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/free-robux-no-human-verafaciton_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/how-to-get-free-vip-in-roblox-fe2_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/adopt-me-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/roblox-hack-red-boy_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/como-hackear-perfiles-de-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/roblox-ios-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/hacker-group-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/how-to-hack-a-roblox-account-with-inspect-element-2021_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/hacks-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F2 22664 bytes
SHA-256: d273a52d6817704403cc9872ad5a7802ac2dbd18480c5a1beeda184b7306fab6
font_01_sfnt_off000063d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D4 19828 bytes
SHA-256: b964c30e9609914df6fed5f9cdc08065554e12a7e6e2aca2273ba673ffec43da

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