Malicious PDF — malware analysis report

Static analysis result for SHA-256 2157297143517272…

MALICIOUS

PDF

36.1 KB Created: 2021-07-05 06:08:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 64960e38afa9b4a03d9ea8b142676db9 SHA-1: f7b688787211e905ba9832855c3da1c425f08b51 SHA-256: 21572971435172729c385abf55aaf1c1724956bf2a2a743cb238e8738a1576b0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is designed as a lure, presenting itself as a "Coin Master Hack Apk" to trick users into clicking malicious links. The primary link redirects to known malicious infrastructure, likely serving as a gateway to download further malicious payloads. The ML classifier strongly supports the malicious nature of this PDF.

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-hack-apk-35-13-game-hack In PDF document text
    • https://c2o-library.net/catalog/repository/new-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/shirt-ash-on-roblox-free-on-shirt-free7_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hack-tener-muchos-diamantes-en-royale-high-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-no-download-on-ipad_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-obc-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hack-robux-with-no-gift-card_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-skywars-fly-hack_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-offer-site_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/broken-bones-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-roblox-admin-download_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-no-clip-hack-download-201_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/202100-free-spins-coin-master_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_002_off00003325.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3325 24108 bytes
SHA-256: d7640f45ecbe25144894cd8627dc586245a820c060cfd6bc770ff283c0005852
font_01_sfnt_off00006970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6970 18592 bytes
SHA-256: 7f49051940b6b9efc6132f30ff89e7b8d09fd75ee36cd2478622d195921c531a

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