Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc4502170d7818e…

MALICIOUS

PDF

34.4 KB Created: 2021-06-19 23:30:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 71da6905d2f8da99b2571c863d814564 SHA-1: e9f2aea039702faa189dbbdea0c6b1c579974f3f SHA-256: afc4502170d7818e170f567cb5ab5907c9dd29ffab4cf34517b85f021df794c0
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document employs a common lure of game hacks and free in-game currency to entice users. It contains numerous links to external websites, including one at http://netcdn.co/app/431946152/how-to-hack-a-youtubers-roblox-account-game-hack, which is likely designed to lead to credential harvesting or malware downloads. The presence of a large number of SEO-optimized PDF links suggests a link farm intended to drive traffic to these malicious lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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.
  • 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/how-to-hack-a-youtubers-roblox-account-game-hack PDF link annotation
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-know-if-your-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-hack-into-my-roblox-account_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-get-free-exotics-in-roblox-assassin-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-cheat-robux-pc_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/cheat-engine-for-roblox-apocalypse-rising_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/game-guarfian-roblox-invisibilitt-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-toy-codes-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/robux-hacks-that-work-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/hack-to-send-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/robux-hack-me_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_off00002f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F88 22196 bytes
SHA-256: 0ca2d88a9733a72f34f1bc3df244a9836242d4fbe96163d78350a9901e36631b
font_01_sfnt_off00006095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6095 19228 bytes
SHA-256: 81cd6bef87689441310331a1c07c2b3484122d31dd35b6e6490641ae43f4b33c

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