Malicious PDF — malware analysis report

Static analysis result for SHA-256 2928bb094a9d30d6…

MALICIOUS

PDF

33.1 KB Created: 2021-07-05 13:41:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a62ab2a6c5bdf624240303c1deb8bade SHA-1: b62c23129ec26840b36ea8ddbbfa47d80487fd2e SHA-256: 2928bb094a9d30d657de3a895fa672845af213980f891108f5c317a5c91506bc
76 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 http://netcdn.tw/app/406889139/get-coin-master-hack-game-hack PDF link annotation
    • http://fkunismuh.org/perpustakaan/repository/pubg-uc-20219_GM1330123889.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-sif_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-get-any-hat-in-roblox-no-hack_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/is-tiktok-free-app_GM835599320.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-hack-roblox-jailbreak-2021-money_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/redeem-roblox-cards-free-codes-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/robux-gainer-hack_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-roblox-gift-card-code-pastebin_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-custom-minecraft-skins_GM479516143.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_off00002fae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FAE 22852 bytes
SHA-256: 1641613c78ba15c23b674f09cef4c6bcaa9a940438c4f9c80f97396bcfc72045
font_01_sfnt_off000062fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62FB 18004 bytes
SHA-256: 973020597ec4509ada4873629b443df7e4e2bd9aab6e332d99193b91c18a1b73

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