Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf42dd6a6744a37a…

MALICIOUS

PDF

44.1 KB Created: 2021-05-19 07:50:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ba50a9056d767e9aed6800934b794f04 SHA-1: a6a4a5e0c344e77033a157f934850aed4fe50e81 SHA-256: cf42dd6a6744a37a056497d98ee7cfbaadb30c6e7742d759ff34debcd59e40de
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and generators, directing users to malicious redirector infrastructure. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-ad-game-hack. The document also contains numerous links to other PDF files hosted on gameanglinginstructors.co.uk, which likely serve as further lures or part of a download chain. No scripts were extracted, but the PDF structure and embedded links indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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-ad-game-hack In PDF document text
    • http://gameanglinginstructors.co.uk/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://gameanglinginstructors.co.uk/images/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://gameanglinginstructors.co.uk/images/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://gameanglinginstructors.co.uk/images/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://gameanglinginstructors.co.uk/images/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://gameanglinginstructors.co.uk/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://gameanglinginstructors.co.uk/images/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://gameanglinginstructors.co.uk/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://gameanglinginstructors.co.uk/images/is-roblox-hacked_GM431946152.pdfIn PDF document text
    • http://gameanglinginstructors.co.uk/images/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://gameanglinginstructors.co.uk/images/coin-master-free-2021_GM406889139.pdfIn PDF document text
    • http://gameanglinginstructors.co.uk/images/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://gameanglinginstructors.co.uk/images/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://gameanglinginstructors.co.uk/images/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://gameanglinginstructors.co.uk/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://gameanglinginstructors.co.uk/images/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://gameanglinginstructors.co.uk/images/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://gameanglinginstructors.co.uk/images/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • http://gameanglinginstructors.co.uk/images/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://gameanglinginstructors.co.uk/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004720.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4720 25028 bytes
SHA-256: 6e038afdcf7ce41717766a74f1f83da5a9a7e11b26bb9a76a7fde63de04560b7
font_01_sfnt_off00008141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8141 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2B 17720 bytes
SHA-256: 77208d2129117d0f3040350cb22de09e5551afc22e9e1407d0b1c547858a443d

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