Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b748b8676d17e16…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 12:39:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c19ed34e5a3d594a904e4e47324ef86e SHA-1: 9b264ed3c4612586165517fa3155345b5e3e3c77 SHA-256: 2b748b8676d17e168d299a358eb3aea38137a0bfaf19bfdac2e8e09a75af264f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure, presenting itself as a 'free generator' or 'game hack' to entice users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious content or downloads, aligning with a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/coin-master-vip-hack-game-hack In PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/picture-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/pokemon-go-free-trade-evolution_GM1094591345.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/roblox-sued_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/hack-coin-master-apk-358_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/op-rewards-free-robux_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_004_off00005032.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5032 25208 bytes
SHA-256: d005961315ed302babfd0eac8620d00dec796fa46249ece45e9d394c5595b23a
font_01_sfnt_off00008a55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A55 19356 bytes
SHA-256: a9854f445b154f78325a7f3de5cf133a6081aabdb90fcef41ca3fd799d4b0d65

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