Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c2d0df01c5df5e5…

MALICIOUS

PDF

35.2 KB Created: 2021-06-28 11:11:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 20455c89f16ce05b460f88c63cc15562 SHA-1: 807f643f003c7b2472d372da45e36bcab80c6a74 SHA-256: 0c2d0df01c5df5e54a0ee6c7ac868237a157e9739808e75027ff1218235a83ea
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to trick users into clicking malicious links. The document contains numerous links to redirector infrastructure and a large number of PDF files, likely part of a link farm or SEO manipulation scheme. The primary malicious URL identified is http://netcdn.co/app/431946152/free-robux-codes-2021-no-human-verification-game-hack, which is flagged as a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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
  • 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/free-robux-codes-2021-no-human-verification-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/denis-how-to-get-free-robux-i-39_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hacks-to-get-spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-likes-and-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-card-link-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/robux-hack-generator-pc_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-website-offers_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/april-roblox-roghoul-script-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/new-figer-hack-pastebin-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-free-robux-tampermonkey_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-glasses_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-with-lucky-patcher_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_off000030ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30AE 22296 bytes
SHA-256: 096f78dd809d4109e86528237c2aa4458715f4d67513c3aefd6b843d3a46177b
font_01_sfnt_off00006212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6212 19912 bytes
SHA-256: 9a60a9069213aca78d40910c8b389a36a1572ebbae15f45362d696583c9d470c

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