Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af87f94b9153536…

MALICIOUS

PDF

35.3 KB Created: 2021-06-18 17:15:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d6b93c86fa11c3e9385d0e436ab47172 SHA-1: 463deb133546c2a6a240bf1a099048c07e51cf35 SHA-256: 7af87f94b9153536244f36bb9e8b41ca45e6bd34cb3263382f9cdabf65ebf278
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on what appears to be a game hack or generator. These links redirect to malicious infrastructure, specifically http://netcdn.co/app/431946152/how-to-hightspeed-roblox-with-cheat-engine-torso-game-hack, which is flagged as a malicious redirector. The document body and embedded URLs reinforce this lure, indicating a phishing or scam attempt to drive traffic to potentially harmful sites.

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/431946152/how-to-hightspeed-roblox-with-cheat-engine-torso-game-hack In PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/pokemon-go-free-coins-without-human-verification_GM1094591345.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-download_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-spin-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/its-free-roblox-ad-released_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-free-coins-and-spins-app_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_off00003161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3161 22636 bytes
SHA-256: 943b112003657956899a00f2ed4bddffb81679229f2632bc3756bee73ab2d473
font_01_sfnt_off000063c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C3 19400 bytes
SHA-256: 063e1a6ff3e9c18ac84b088b66590eb3c214a2508808f96a870d013f4f796687

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