Malicious PDF — malware analysis report

Static analysis result for SHA-256 6318eeca3aa1757a…

MALICIOUS

PDF

42.0 KB Created: 2021-04-30 07:16:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a6e03a1e989d121d99783483a23a295a SHA-1: 770595bb9eee509a7e5d1a75a1eb551292631b72 SHA-256: 6318eeca3aa1757adcda86f00a161b7f6e5409eda1cfdb8e093fa1e8414b29cc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary redirector URL identified as malicious. The document body and heuristics indicate a lure for game-related cheats, specifically 'free Robux', which is a common social engineering tactic. The presence of multiple links to similar content suggests an attempt to drive traffic to potentially malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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.xyz/app/431946152/free-robux-500-game-hack In PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-walk-through-walls-in-roblox-cheat-engine.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-gear-hack-script-pastebin.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-apocalypse-rising-hack-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/1-step-to-get-free-robux.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/robux-gratuit-sans-hack-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/iron-man-script-roblox-hack.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-monster-simulator-hack-script.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-jailbreak-free-vip-server-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-no-human-verification-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-2021-robux-no-human-verification-easy.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
stream_003_off000041dd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x41DD 29260 bytes
SHA-256: 19dcf84fc4f12a27190b8193ece51c82ada8f17ada707361e5003d22bcd78887
font_01_sfnt_off0000824b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x824B 18320 bytes
SHA-256: f362d1b097e712bbe0db96cf0920e271603f24cd303cb4bfc81efe1f51019ad1

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