Malicious PDF — malware analysis report

Static analysis result for SHA-256 86cf272c62eee3fd…

MALICIOUS

PDF

41.4 KB Created: 2021-05-17 21:38:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 42e8cadddb226d67efee186db9aeec00 SHA-1: b259e3be5de9eadf32877ee7610fe388592f08f0 SHA-256: 86cf272c62eee3fd01a4b0f9eb97317e9d4d94b740403e01743920d0e80f28d9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on them, promising free game resources. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or downloads. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-free-spins-for-iphone-game-hack In PDF document text
    • http://cacpglobal.ca/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://cacpglobal.ca/images/free-robux-today_GM431946152.pdfIn PDF document text
    • http://cacpglobal.ca/images/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://cacpglobal.ca/images/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://cacpglobal.ca/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://cacpglobal.ca/images/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://cacpglobal.ca/images/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://cacpglobal.ca/images/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://cacpglobal.ca/images/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/coin-master-pet-food-hack_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://cacpglobal.ca/images/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://cacpglobal.ca/images/roblox-promo-codes-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
stream_003_off000048b8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48B8 24796 bytes
SHA-256: d8aa9d04fb9f70ba85d2bf854bb84d855bbb58ecf1a52e351cf9310c0af4e89b
font_01_sfnt_off0000803c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x803C 18052 bytes
SHA-256: 7a041e18439e61f25930bd292384183aeabfbba1b3f01f5156e579a6d202eabd

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