Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a5e43854e7c8864…

MALICIOUS

PDF

35.1 KB Created: 2021-06-18 19:58:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 7217b3ca23250186641a28eb9e185f69 SHA-1: 316ce1331407cd6422b3c6ffcd333a5554003f24 SHA-256: 4a5e43854e7c88641f9e552fe8a3d01c68f6d90109a9bc73574e3880b29ccea5
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game items and hacks to trick users into clicking malicious links. It contains numerous links to SEO farms and a known malicious redirector, indicating a phishing or scam campaign. The document body and heuristics suggest the primary goal is to drive traffic to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/free-red-wings-roblox-game-hack In PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/roblox-hack-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-verification-or-offers_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/hack-game-roblox-apk_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/moon-tycoon-side-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/roblox-cheats-for-escape-super-clowns_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/roblox-tnt-rush-hack_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/how-to-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/how-to-hack-in-roblox-in-3-step_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/descargar-roblox-apk-hack-monedas-infinitas_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/how-to-hack-in-roblox-jailbreak-2021-february_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/free-robux-codes-september-2021_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/roblox-grand-blox-auto-2-all-cmds-hack_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/free-robux-for-playing-games_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/hacks-para-roblox-2021-jailbreak-mayo_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.schIn macro / runtime command snippet
    • 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_off00003290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3290 22216 bytes
SHA-256: 44bf7a024e20a3cb0cd61527cb0ef3c834f5e3cf55742bcc3e513e55ef99cf2e
font_01_sfnt_off000063f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F0 19140 bytes
SHA-256: 59e1ca7183f1a762096e4d867f5225709ecfdddd1f5864c43afd2a4a2bebb0ee

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