Malicious PDF — malware analysis report

Static analysis result for SHA-256 f39e49089dddde0e…

MALICIOUS

PDF

35.3 KB Created: 2021-06-09 04:54:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 29394c484f949c8e319f7266ae32483c SHA-1: d8bcc29490ef1081a8c984f304239431fab98c5b SHA-256: f39e49089dddde0e50d2f41ea852459450bcbecc3e83c1c84aa593f9926ec9a4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link disguised as a 'free generator / game hack' which is a common lure for phishing or malware distribution. The link redirects to a known malicious infrastructure, indicating an attempt to lead the user to a compromised or malicious website. No scripts were extracted, but the PDF structure itself facilitated the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/hack-roblox-account-2021-game-hack In PDF document text
    • http://www.nfca.org.tw/upload/files/free-roblox-girl-clothes_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/400-robux-free-2021_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-free-items_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-get-auto-clicker-for-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ed1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ED1 26244 bytes
SHA-256: 973c68d7a258b3fbd378a64bc7fe9bd57006dfc89ca28e5558e1c65c23f5fc11

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