Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b58b591b03e497e…

MALICIOUS

PDF

35.4 KB Created: 2021-07-04 12:03:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 99f5b6b47d274b257001c89d11762f93 SHA-1: 4a34266e6fdef9e0f9ceb4d067f6d99f606fd7c1 SHA-256: 6b58b591b03e497e464d1fb633c27402dac9e5670556265aa978bdb11a2a45e9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites that are identified as malicious redirectors or host potentially unwanted files, specifically targeting users interested in game hacks for Coin Master and Roblox. The presence of a visual download button lure and the ML classifier's high confidence score further support the malicious nature of this document. The primary attack pattern involves luring users to click on these links, which likely leads to the download of second-stage malware or engagement with phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-hack-xyz-download-game-hack In PDF document text
    • http://www.sovtigaz.ru/f/files/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-free-roam-games-grand-blox_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-gift-card-free-no-human-very-or-survey_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-pastebin-no-wait-or-suscribe_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-hack-on-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-hacked-arcadeprehacks_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-hack-in-roblox-prison-life-on-ipad_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/hacks-for-texting-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-no-human-verification-android-2021_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-free-robux-codes-wiki_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/what-is-a-robux_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-website-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-free-robux_GM431946152.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
font_00_sfnt_off000031a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A7 22884 bytes
SHA-256: 15d30878196b95b6f8dd2571c804af08477ea559443867b1b488fd98c0ea6297
font_01_sfnt_off00006505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6505 19076 bytes
SHA-256: 80916ab4dc3e495d31744a257699d51f483bf697ed2b8c02cac62c21ff93b7b6