Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d44cde56a93304c…

MALICIOUS

PDF

45.9 KB Created: 2021-06-03 07:39:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3e89d6d7038ca487bf3d8a73aba85f50 SHA-1: e320582a42b428e9fc5a5d840356508047758111 SHA-256: 1d44cde56a93304c40899593cefb942ecb14f4ae7c2126b5e9ef1c85c378b9d7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a known malicious domain, masquerading as a 'free generator' or 'game hack' lure. The document body and extracted URLs suggest a phishing attempt to trick users into visiting malicious sites, likely for credential harvesting or further malware delivery. No scripts were extracted, but the PDF structure and embedded URLs indicate a malicious redirection workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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 https://netcdn.online/app/406889139/how-to-earn-free-spins-coin-master-game-hack In PDF document text
    • http://foo.com.tw/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/free-tiktok-likes-and-followers_GM835599320.pdfIn PDF document text
    • http://foo.com.tw/files/minecraft-hacks-xbox-one_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/free-robux-images_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-free-spons-apk-2021_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-village-4_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/free-roblox-cards-pin-number_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f8a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F8A 24488 bytes
SHA-256: 580e17b6060c9bf75d710d1a0f8b0a2eb0f8962aa6723864b315be26cd829569
font_01_sfnt_off00008776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8776 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9161 18052 bytes
SHA-256: 3c90058a0459d49c606198fd695e9726967f61199941b7ff7c4219412436d59a

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