Malicious PDF — malware analysis report

Static analysis result for SHA-256 c529b60b93be4783…

MALICIOUS

PDF

36.9 KB Created: 2021-06-19 17:41:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9f269fe3c8dd183048bbdbb5ffc5d1b5 SHA-1: 0b7e276332f4ad39d5e99bd5bacfbcc3e911281d SHA-256: c529b60b93be47830c1027853d945fa1fdc478215c8fcaccf1f20326e5233e8b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and 'game hacks', directly linking to a known malicious redirector. This indicates a phishing attempt designed to trick users into visiting a malicious site, likely for credential harvesting or further malware delivery. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-make-free-robux-game-hack In PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-hack-m-coins-mcpe-master_GM406889139.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-no-inspect-element-2021_GM431946152.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/robux-apps-free-download_GM431946152.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/free-adidas-clothes-roblox_GM431946152.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-free-download-android-apk_GM479516143.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/rexima-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/robux-free-online_GM431946152.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-link_GM431946152.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/hack-to-get-into-vip-room-in-forgotten-world-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000035fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35FA 23364 bytes
SHA-256: 13b0cde10985d14a3527d3ab969677aedaaff6762d9aeb297daa5deec0fad636
font_01_sfnt_off00006b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B0A 19244 bytes
SHA-256: 6b22af1083df9260d35a8428a36ac91eb4c7dbc1159f4e02fe88489ba0efcc00

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