Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c74805754d0d5d5…

MALICIOUS

PDF

35.5 KB Created: 2021-06-18 07:07:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5b4af40c55632caa7a65cd743da8c137 SHA-1: ed624424c6d822a87ebc30981d0c3cc09fd0fd38 SHA-256: 9c74805754d0d5d596d2e4dec4d700c3f57afa5bce5266dc0ba557f0782f88e4
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are SEO-optimized and point to sites offering free in-game currency or hacks for popular games like Roblox and Coin Master. The document body and extracted URLs suggest a lure for users seeking such items, likely leading to malicious downloads or phishing sites. The ML classifier also strongly indicated maliciousness.

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 http://netcdn.co/app/431946152/overhol-roblox-free-shop-2021-game-hack PDF link annotation
    • http://muslib.unmus.ac.id/repository/how-to-get-free-robux-2021-working-august-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-no-buying-apps_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-jackpot-madness-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-executor-good-api_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/getrobux-come_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/tiktok-free-textbooks_GM835599320.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/dragon-ball-fury-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-cards_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-duplicate-coin-master-spin-hack_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
font_00_sfnt_off00003246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3246 22496 bytes
SHA-256: 48b33e479dc431eb619379b821373a56cf19d1be4d5ead0abe109bdb4f48c66c
font_01_sfnt_off00006482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6482 19508 bytes
SHA-256: 57ef2065677231a7c639aa77ef4cf30b0fa292169edc5447419f1f08ced04b3a

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