Malicious PDF — malware analysis report

Static analysis result for SHA-256 b26fbf056f47901a…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 06:52:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 9de42f6ed6d91440570d3473b9fcbdcb SHA-1: 5b2fe503858d688cf2622a2e92ec02c53217ca0a SHA-256: b26fbf056f47901ab14d9dc8eac87398e7ce1f2fca3b9e0ad55edeb68eeaa1a2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links and embedded text promoting 'game hacks' and 'free spins', directing users to a known malicious redirector. The primary lure is a link to 'coin-master-hacks-no-human-verification-game-hack' hosted on netcdn.tw, which is flagged as malicious infrastructure. This suggests a phishing or scam attempt to trick users into visiting potentially harmful 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-hacks-no-human-verification-game-hack In PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/does-john-doe-actually-hack-roblox_GM431946152.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-app-real_GM431946152.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/op-rewards-robux_GM431946152.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-just-click_GM431946152.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-hack-in-attrition-roblox_GM431946152.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-speed-hack-2021-download_GM431946152.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/minecraft-client_GM479516143.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-hack-boku-no-roblox_GM431946152.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-tos-for-cheating-and-exploiting_GM431946152.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/pubg-600-uc-in-pakistani-rupees_GM1330123889.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/freer-pro-tiktok_GM835599320.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-how-to-get-animation-packs-free_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_off00003305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3305 22564 bytes
SHA-256: 80ff04ec9eef151732b0c5bf49b07bda3f59d0cb143da612ee6164cebeb1c1d6
font_01_sfnt_off0000654d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x654D 18540 bytes
SHA-256: be7925905a3cbe2c3ec6c08efd648bb1fac1fd605dc94fa0f28581d8b5cb9fcb

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