Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3b75d87fd6e1285…

MALICIOUS

PDF

35.8 KB Created: 2021-06-29 19:21:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 35e81ee07d98ae33709109641f6ae7ae SHA-1: 08d744b50a130cdd13f270035569632f20f49ff4 SHA-256: b3b75d87fd6e1285c92125e361217d4598cc2328d0965728b0c173f0105e950d
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/a-promocode-that-gets-us-free-robux-no-waiting-game-hack PDF link annotation
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/how-to-get-everything-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/roblox-cheats-november-2021_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/how-to-hack-in-roblox-jailbreak-on-ipad_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-obc-2021-discord_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/ninja-legends-roblox-script-hack-decembre-2021_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/how-to-hack-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/azure-mines-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/free-robux-venerator_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/free-expire-items-on-roblox_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/how-to-get-free-money-in-the-plaza-roblox_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/isle-how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/roblox-noclip-hack-december-2021_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/roblox-games-unblocked-free_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/free-roblox-backdoor-to-earn-robux_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/free-robux-no-surver_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/free-robux-without-paying_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_off00003139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3139 23192 bytes
SHA-256: da49d5f6305765890ff8f0006720938376dea849457f7fe7bd871b82b893adbb
font_01_sfnt_off000064a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A4 19892 bytes
SHA-256: 62455c9b9c6924da48433129ce765b9933b0c78b23709bf33433d57a7fabf5d8

Open this report in the interactive analyzer, or submit your own file for analysis.