Malicious PDF — malware analysis report

Static analysis result for SHA-256 fea795bac523f696…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 12:13:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 84b9e94c98f5cb4e20899ce97dd226a6 SHA-1: f02551c357d45e5faf8df8c6030c10974114d62e SHA-256: fea795bac523f6961ea165ffbd624f3c18e9cfb4618957220b20839d0f826694
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links that lead to malicious redirectors and a link farm, masquerading as game hacks and generators. The primary lure appears to be related to popular games like Coin Master and Roblox. The document's structure and embedded links strongly suggest an attempt to direct users to potentially malicious websites, likely for ad fraud, phishing, or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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-links-2021-game-hack In PDF document text
    • http://www.salwangurgaon.com/files/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/video-hacker-roblox-francais_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-spins-and-coins-com_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/how-to-get-free-robux-mobile-root-needed_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/list-of-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/fre-robux-fro-reallllllll_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/cheats-for-roblox-phantom-forces_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_off00003217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3217 22716 bytes
SHA-256: f4a1ba4d04216129311cccc631e77c5c31cd5ceb22d1514ac848f0a0c5984be9
font_01_sfnt_off000064e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E4 18408 bytes
SHA-256: 6fe21a9bf5c801afdb7cf20c2591055322dbca46201e9d01301abf0926b30be5

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