Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1ac64b4c4490f47…

MALICIOUS

PDF

48.8 KB Created: 2021-05-12 12:52:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 78f3d453f13e0cd0de6a2009f1546810 SHA-1: 26cb7d109bdecbe33203a52854fc8ca3a713eaad SHA-256: f1ac64b4c4490f476346ee7804d0e04f0d7ddd1de468c5943e04d67af7f8b786
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and a link farm, designed to lure users into clicking on deceptive content related to game hacks and free currency. The primary redirector URL is https://netcdn.xyz/app/406889139/coin-master-free-gold-game-hack, which is part of a larger infrastructure hosting numerous PDF files with similar lures. The document body and embedded links strongly suggest a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9228

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/406889139/coin-master-free-gold-game-hack In PDF document text
    • https://www.manmed.info:443/images/apps-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free-coins-facebook_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free-spin-and-coins-links-home_GM406889139.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_off000048e7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48E7 29628 bytes
SHA-256: 297519df2c0d698fa9aa4faa7963a45043d6d53906b37cb5be1afa96ffda4318
font_01_sfnt_off000088f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88F3 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_02_sfnt_off00009d7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D7D 17960 bytes
SHA-256: aba9a61c61b61fea048b73d77d5e297f3d5a3a83c57e433c8854d820da1f91b9

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