Malicious PDF — malware analysis report

Static analysis result for SHA-256 437726f2e13859e0…

MALICIOUS

PDF

42.7 KB Created: 2021-05-13 11:11:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dab58b0b9f09fc8030304821e49a7e6e SHA-1: b7cd1b71630d56232470183a01005fbc836e4faf SHA-256: 437726f2e13859e00af483b143f02b2aeb60fdc47d14efac7b641516c7cf1567
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically targeting users with 'free generator' and 'game hack' lures. The document body and heuristics indicate a clear intent to drive users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure itself facilitates these malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/431946152/free-robux-without-verification-game-hack In PDF document text
    • http://erptrends.com/images/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://erptrends.com/images/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://erptrends.com/images/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://erptrends.com/images/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://erptrends.com/images/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://erptrends.com/images/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://erptrends.com/images/www-rubux_GM431946152.pdfIn PDF document text
    • http://erptrends.com/images/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
    • http://erptrends.com/images/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://erptrends.com/images/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://erptrends.com/images/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://erptrends.com/images/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://erptrends.com/images/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://erptrends.com/images/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://erptrends.com/images/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://erptrends.com/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://erptrends.com/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://erptrends.com/images/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://erptrends.com/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://erptrends.com/images/free-coin-master-cards_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
font_00_sfnt_off00004874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4874 25136 bytes
SHA-256: 15f254134b96a8ee2ad746f9c92b69e3f34a6a9171914ca2c4eb5c0ca9116575
font_01_sfnt_off00008285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8285 18964 bytes
SHA-256: 5864977637737ef4e1bd5b7bfc66e5602b8aa3d3ed60f74fb5f96fd63c3aa8ef

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