Malicious PDF — malware analysis report

Static analysis result for SHA-256 74bbd21ff4147298…

MALICIOUS

PDF

35.9 KB Created: 2021-05-21 18:01:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 53084184b7f75299f1d3bf7baeb7291f SHA-1: f21c74d5e551dedbf403a7aa94755143312890bd SHA-256: 74bbd21ff414729880f3087c26dc215283bfa2e200d8c1b41345c4203018f134
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' for popular games. The document body and heuristics indicate a lure to click these links, which likely lead to further malicious content or malware downloads. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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.xyz/app/406889139/coin-master-free-spins-promo-code-game-hack In PDF document text
    • https://www.quistschoenenhalsteren.nl/images/free-roblox-money_GM431946152.pdfIn PDF document text
    • https://www.quistschoenenhalsteren.nl/images/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.quistschoenenhalsteren.nl/images/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.quistschoenenhalsteren.nl/images/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • https://www.quistschoenenhalsteren.nl/images/real-minecraft-for-free_GM479516143.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_off000031a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31A2 26116 bytes
SHA-256: d9e2a7edeb261bc64558237dbfe0b25991923b9b7458b39e505db3f43ce5fe4c
font_01_sfnt_off00006aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAA 18476 bytes
SHA-256: dc3ef91c42b56b19e880a129857b9cc4209ff723fc15082788877c1745c42c0a

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