Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf186edfd39ff36…

MALICIOUS

PDF

33.0 KB Created: 2021-07-06 12:46:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: f3ac286eb06ff02ecb48c55ed5568407 SHA-1: 0e9e329e4d3c17c59da0589c825b10d410f72314 SHA-256: 1cf186edfd39ff36843ab62c259477918ed91cfbad9cdad64c05c1b2e248ecb0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a malicious link that redirects to known malicious infrastructure, masquerading as a 'free generator / game hack'. The document body and heuristics indicate a lure for users to click the link, likely leading to a phishing or malware download site. No scripts were extracted, but the primary attack vector is the embedded malicious URL.

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.tw/app/835599320/tiktok-free-pc-download-game-hack In PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-free-draw-pen_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-egghunt-2021-hack_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-free-spin-and-trading_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-ship-code-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-star-codes-for-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/esp-x-ray-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-robux-games-on-the-front-page_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-get-free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-rc7-hack-scripts_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-free-draw-2-hack_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-hacking-admin-commands-roblox-jailbreak-2021_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_off00002f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F16 21032 bytes
SHA-256: 155fd4c8823a34ae1a72de63e312dd3afcadbe54eb4e7cf69ecdc0e88501d87c
font_01_sfnt_off00005cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC4 18708 bytes
SHA-256: 6afbd61eec14beb2adbaae61809a90ce689601cf0a428a06cbec1d209ada9045

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