Malicious PDF — malware analysis report

Static analysis result for SHA-256 098b0799dad68072…

MALICIOUS

PDF

33.8 KB Created: 2021-06-21 11:58:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9a82584a0affe3b6c90bd61db6191583 SHA-1: a291bd3ea81709bf9550762e815ec639c5850e0f SHA-256: 098b0799dad68072a5fdaf8fd176b8d919334dcacd79766e8e25d9540d897e37
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and a prominent redirector URL, identified as malicious. These links are designed to lure users into clicking on them by promising free game items or hacks. The primary malicious URL, http://netcdn.co/app/406889139/coin-master-free-spins-link-game-hack, is likely part of a chain leading to further malicious content or phishing pages.

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/406889139/coin-master-free-spins-link-game-hack In PDF document text
    • https://dr-willmer.de/images/free-domnius-roblox_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://dr-willmer.de/images/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • https://dr-willmer.de/images/robux-free-2021_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/pubg-uc-exchange_GM1330123889.pdfIn PDF document text
    • https://dr-willmer.de/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://dr-willmer.de/images/80-robux-hack_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/roblox-t-shirt-adidas-free_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://dr-willmer.de/images/robux-com-free_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/how-to-have-bcc-in-roblox-free_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/coin-master-fan-page-giveaway_GM406889139.pdfIn PDF document text
    • https://dr-willmer.de/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://dr-willmer.de/images/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://dr-willmer.de/images/free-robux-card-codes_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_off00002e74.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E74 22604 bytes
SHA-256: c950b4144c4858bcf75264cf8f5ea4209a50b47045753476a8f7ffc5e1182be0
font_01_sfnt_off00006119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6119 18344 bytes
SHA-256: 01b831504896dfaed35d51ec646485350627a831fcdd06f8660974e1004fbd35

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