Malicious PDF — malware analysis report

Static analysis result for SHA-256 7365fe667c9560c2…

MALICIOUS

PDF

35.7 KB Created: 2021-07-06 09:44:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6600016a394ec4e28cc8b9f8bd607318 SHA-1: 66bae2752f9c90d2d493eeae9cbb126b873dff1a SHA-256: 7365fe667c9560c25c5877d9b181dd4b9915af045a8d1037fda659fb0c814825
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector hosted on 'netcdn.tw' which is flagged as malicious. The document body and embedded URLs suggest a lure for game-related cheats or currency, likely a social engineering tactic to drive traffic to malicious sites. No scripts were extracted, but the PDF structure and embedded links indicate a phishing or scam attempt.

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/406889139/coin-master-free-link-game-hack In PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/how-to-get-free-robux-fast-and-easy-2021_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/free-robux-come_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/roblox-free-robuxhack_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/hack-fly-codes-roblox_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/roblox-re_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/python-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/easy-way-to-get-free-robux_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
stream_002_off000033dc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33DC 23512 bytes
SHA-256: 05fc1a6b74e6793b77355ac9949060076d320c129a0d5a2e22646d4636c7ad1d
font_01_sfnt_off00006940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6940 18168 bytes
SHA-256: 7e3864b359ae4e20f98f554aea3d5366a72fce57ca0fb6405be6acd76bdcbaac

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