Malicious PDF — malware analysis report

Static analysis result for SHA-256 445cd71ebd5dfe02…

MALICIOUS

PDF

44.7 KB Created: 2021-05-16 13:22:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f47a308ea37308974ac4a75c6ae14ee1 SHA-1: 51068b8b0523d034095b111492fee510a2cf80ef SHA-256: 445cd71ebd5dfe023b4de441dd936489fa000dc35ae1823a7668f02aacc28811
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links, many of which are structured as SEO-optimized links pointing to other PDF files, suggesting a link farm or content aggregation tactic. The primary URL and many others are related to game hacking, indicating a lure for users seeking cheats or exploits. The ML classifier strongly flagged this PDF as malicious, supporting the assessment that it is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/hack-coin-master-without-root-game-hack PDF link annotation
    • https://esl.ipb.ac.id/images/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/free-robux-android_GM431946152.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/roblox-login-hack_GM431946152.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/roblox-g_GM431946152.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/easy-robux_GM431946152.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/how-to-get-stuff-that-cost-coins-free-mcpe-master_GM406889139.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/coin-master-free-spins-without-verification_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_off00004e9b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E9B 28316 bytes
SHA-256: 0b16c54581c69e23434306211bc0490847710e724bac27521be2e67aa9a1652f
font_01_sfnt_off00008c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C9C 18220 bytes
SHA-256: f7c332eb71ee68567a156ee4ffc1663e8dd4a771b18221acbaeb25ae337ccf62

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