Malicious PDF — malware analysis report

Static analysis result for SHA-256 65dd3ec798415ce9…

MALICIOUS

PDF

42.8 KB Created: 2021-05-11 23:03:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ee16f3e79cbc22a1ed3330f2c556e5b7 SHA-1: 8cbb5342c977abc9b0e0a0c99a1a183dbdb73e42 SHA-256: 65dd3ec798415ce9740b19d373e39b68d364e1be4c5cbdcf622409ad922a0807
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to lure users into downloading game hacks or cheats, with one primary link pointing to a known malicious redirector. The document body and embedded links suggest a social engineering tactic to drive traffic to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to redirect users, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/479516143/how-to-download-wurst-game-hack In PDF document text
    • http://www.copoint.co.uk/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-online-hack-generator_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/minecraft-xbox-360-free_GM479516143.pdfIn PDF document text
    • http://www.copoint.co.uk/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-tips_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/free-coin_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-map_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • http://www.copoint.co.uk/images/hack-coin-master-download_GM406889139.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_off00004baf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BAF 24944 bytes
SHA-256: e27cba2f32f60227f20c29a7ae3b3e8117c1b284dc213f0d899daa5e0afc99d0
font_01_sfnt_off00008465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8465 18508 bytes
SHA-256: 7549c5ff242de623ced2015b0eb416b949beaaafe418d998374bf37911f2b306

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