Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd4fee9bffcc212…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 11:14:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: aa99f40da1b96d9fc39e5f2bbfadd04f SHA-1: 711306c83d51d3680a580849cf7e5a322715841d SHA-256: 1bd4fee9bffcc212280a2a91f9b9c08b979776e81a929c859c001b669aec34bd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating it is a malicious redirector lure, specifically targeting users interested in game hacks and free currency. The primary malicious URL, http://netcdn.tw/app/431946152/free-no-hack-robux-generators-game-hack, is identified as a known malicious redirector. The document body reinforces this by displaying similar lure text and URLs.

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/431946152/free-no-hack-robux-generators-game-hack In PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-codes-for-roblox-trade-hangout_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-do-you-hack-in-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/100-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-hack-roblox-jailbreak-money-with-cheat-engine_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/wwwmyrealgamescom-genres-freegamesdownload-index3html-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/unlimited-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/haktuts-coin-master_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-verified-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-that-really-works-that-dont-need-human-verifacation_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-2021-august-codes_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/dgeler-rocach-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/rise-of-nations-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-aimbot-for-any-game-and-no-virus-roblox_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
font_00_sfnt_off000030f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F2 22132 bytes
SHA-256: a866d2ded91310f8c8f951a59146525a7bf4459ffb0ea9e22ad586959b6ad1b9
font_01_sfnt_off00006210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6210 18804 bytes
SHA-256: 3c8024ea98ee12f8945f29374c4169e24ffe7cd5f6a29138ec16b87a8ce3923c

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