Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e67b561f9ca9e6a…

MALICIOUS

PDF

35.7 KB Created: 2021-07-06 08:01:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ac5cf99fc308374f690f834ff545ce8b SHA-1: fcf04deba72b9d8b49b067be166fad9fb837176e SHA-256: 8e67b561f9ca9e6af7042726f30908521507ab1204cf9840536b7c8498365c0c
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one to a known malicious redirector, designed to lure users into clicking on promises of free game currency or hacks. The document body and heuristics indicate a scam related to 'Roblox Robux Generator' and similar game-related lures. The presence of multiple external links suggests an attempt to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/roblox-robux-generator-2021-game-hack In PDF document text
    • https://opac.heritagejkt.org/repository/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-hack-in-robux-in-game-cheat_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-hack-and-on-roblox-on-murderer-mystery-2_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/robuxe-gratuit-site-de-hack-roblox_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/daily-free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-roblox-cards-pin-number_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-robux-videos_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/codigo-hack-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-daily-free-rewards_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/774-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-tiktok-followers-no-survey_GM835599320.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-robux-cc_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-robux-codes-no-inspect_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-cheat-engine-hacks-december-2021_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/pastebin-com-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/free-spins-coin-master-march-2021_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-cheat-furk_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 4

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_off000032a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32A1 22928 bytes
SHA-256: 38cce5f7a4a1b46ecbf9efaae8398a6538ab10010a2077a873eed6b244f3da6d
font_01_sfnt_off000065fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65FB 19132 bytes
SHA-256: 6401bcd129901e19178bc0ea301a18cd362f26daf5d55f3217fd4f2a50f8f5de

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