Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cd1207112052a76…

MALICIOUS

PDF

33.7 KB Created: 2021-07-22 12:51:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1438c3b36deda741ef0a9b22a57f545e SHA-1: 5270c6bb70e5855bf6f657f9c718a349fdcc13d3 SHA-256: 1cd1207112052a767d9777fbb85f8fb698ed4d2abce17e16fdbf9654f0e75445
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free game currency and hacks, directing users to the malicious redirector URL http://netcdn.tw/app/406889139/free-spins-coin-master-game-hack. This URL is associated with known malicious redirector infrastructure. The document body also contains numerous other URLs pointing to similar lure-based PDF files, suggesting a campaign distributing such content. No scripts were extracted, but the presence of malicious links and redirectors indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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/free-spins-coin-master-game-hack In PDF document text
    • https://porownaj-laser.pl/images/free-tiktok-views_GM835599320.pdfIn PDF document text
    • https://porownaj-laser.pl/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://porownaj-laser.pl/images/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://porownaj-laser.pl/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://porownaj-laser.pl/images/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://porownaj-laser.pl/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://porownaj-laser.pl/images/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://porownaj-laser.pl/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://porownaj-laser.pl/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://porownaj-laser.pl/images/coin-master-hack-without-verification-2021_GM406889139.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_off00002da3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DA3 23488 bytes
SHA-256: df27223108c40b772403dde380d725b41edb78693ecb6747f1235f6235f8e023
font_01_sfnt_off00006302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6302 17884 bytes
SHA-256: 18816d8d761583b578c9833b8849e2eeaed27ef2f16a893d2032c58e3f8148b6

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