Malicious PDF — malware analysis report

Static analysis result for SHA-256 564db71452a1ec35…

MALICIOUS

PDF

35.9 KB Created: 2021-07-06 12:24:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ad71edf2096d77ee206b93977551e9a9 SHA-1: 71cf0efb6cd9f4b7a317c4d0dee7919fd7ede702 SHA-256: 564db71452a1ec35ee8aae87cddac764d03cf50e764d9472c8b06c12f6fcc28f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically advertising game hacks and generators for popular games like Coin Master and Roblox. The primary lure URL, http://netcdn.tw/app/406889139/coin-master-claim-spins-game-hack, is flagged as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites, likely for credential harvesting or further malware delivery.

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-claim-spins-game-hack In PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/beautiful-roblox-shirt-template-download-free_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-hack-tool-without-verification_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/50-free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/roblox-hack-generator_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
stream_002_off0000335d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x335D 23872 bytes
SHA-256: 2e92b57d63401cbc21ddc52e07b070b5870b8749911ac7c16e07e5358e33af4e
font_01_sfnt_off000069ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69CE 18344 bytes
SHA-256: d8cccda057f64c947ab6ae0a87057660c374c9b091fe16e0f35107dc7c5d8ca5

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