Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d10d5b2f658eecb…

MALICIOUS

PDF

49.5 KB Created: 2021-06-08 23:45:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9e22727d7b2aeb3f48749405eb5484e4 SHA-1: 173f646f9d843ce04a71b1879bc84b7ecb92508d SHA-256: 2d10d5b2f658eecb3bf002e5582965dc1ee5bd22e8bfec852b174cb21af36987
76 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lure users with promises of free game items and hacks, specifically targeting Roblox. The primary link, https://netcdn.tw/app/431946152/free-stuff-on-roblox-catalog-2021-game-hack, is identified as a high-risk indicator. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or redirection attack, likely intended to lead users to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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.tw/app/431946152/free-stuff-on-roblox-catalog-2021-game-hack PDF link annotation
    • http://digilib.uim.ac.id/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-com_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/best-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/robux-for-kids_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-hack-to-get-robux_GM431946152.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_004_off000052df.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52DF 28136 bytes
SHA-256: 038acb2bc2fd4a98638dc915d433804095eb2d6057acc1f3c2eabbc59437a356
font_01_sfnt_off0000932a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x932A 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off00009d27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D27 19112 bytes
SHA-256: eb74f21d1a3452680e700a69a2a511b15c3dc2c2dce6923b978a946f9d195710

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