Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f00325a01c5f55a…

MALICIOUS

PDF

47.2 KB Created: 2021-06-03 10:47:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7cf16d07ff7015338589b6fd32606ce1 SHA-1: da0eb785f77d0ad1628b5f9cdf9d85e875568886 SHA-256: 2f00325a01c5f55ac39ec40e370b1446814021aea650e1920455c7b4d8c8aa55
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, masquerading as game hacks or generators. The primary link directs users to 'netcdn.online', which is flagged as malicious infrastructure. The document body, though heavily obfuscated, contains references to these lures and embedded URLs. The presence of these malicious links strongly suggests an attempt to redirect users to a site that likely hosts further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/479516143/how-to-hack-a-minecraft-server-game-hack In PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-cards_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/pokemon-go-free-qr-codes-2021_GM1094591345.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-online-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53E1 25000 bytes
SHA-256: 1bb4c4c563b479d7f436eedb1cc12fa3bf56f9b002af8ea309a24624a3b802f2
font_01_sfnt_off00008c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C4C 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off000095ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95FF 18156 bytes
SHA-256: a161276dde2563737e729d23e9d7b4e88663ff4ff7cddafc48ded70db5af995a

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