Malicious PDF — malware analysis report

Static analysis result for SHA-256 43b3f15de7b70e56…

MALICIOUS

PDF

48.0 KB Created: 2021-06-11 07:52:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b43cae349440c3b89fb321d72cc27b88 SHA-1: af9bd1b56e60ce5d5c989426ada7220425a8c5ab SHA-256: 43b3f15de7b70e5609cdcff99cef0c116f168a4a5c7cfe828b829233d943a8fa
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as 'game hacks' and 'free currency generators'. The primary redirector URL is https://netcdn.tw/app/431946152/roblox-cb-ro-hack-script-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection, likely intended to lead users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9872

Heuristics 3

  • 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.
  • 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.tw/app/431946152/roblox-cb-ro-hack-script-game-hack In PDF document text
    • https://dentmate.com.tw/image/data/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-roblox-codes-2021-december_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/get-more-robux_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/roblox-cheat-codres_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/get-robux-today_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-hack-blogspot_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/is-minecraft-free-on-nintendo-switch_GM479516143.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
font_00_sfnt_off0000532f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x532F 30216 bytes
SHA-256: 90e44559dc028289c177ecc7fac09ba19feb432643dd1283a851532c1db42610
font_01_sfnt_off00009989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9989 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5

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