Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e55855c915445e…

MALICIOUS

PDF

44.6 KB Created: 2021-05-13 11:32:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 601827220779a5cf50a13dcce01cb6bc SHA-1: 315bc0052163e9100f6a055f201c8f15c9064494 SHA-256: 36e55855c915445eeabc1fc1c16978001fe7ae5233f9231262e0624f72c55a60
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors disguised as free game hacks and robux generators. The ML classifier also flagged this PDF as malicious. The embedded links are designed to lure users to potentially harmful websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/robux-com-free-game-hack In PDF document text
    • http://vedrachemicals.ro/images/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/real-robux-codes_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/claimrobux-net_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/robux-download_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/minecraft-hacks-for-2b2t_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-hack-online-2021_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048cc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48CC 24888 bytes
SHA-256: 6989936495e11fcefac45ab777b5c136afe736f57890ba0e205723a3f7639ea7
font_01_sfnt_off00008204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8204 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00008bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB3 18276 bytes
SHA-256: 15a0db03ecad41b32ad15729058012b5ee1d917146ec7af3e780186d41394abc

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