Malicious PDF — malware analysis report

Static analysis result for SHA-256 87e8326ccbc8fb08…

MALICIOUS

PDF

19.2 KB Created: 2021-07-04 18:58:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7dd2220660553122e144de39b052ad40 SHA-1: 0283e315ad37edba50a65fe2cb8e982629b0c279 SHA-256: 87e8326ccbc8fb08dadcf4337316e733c8376d547182bf99eee1776c153fa7e7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The primary lure appears to be related to 'Coin Master' and 'Roblox' cheats. The embedded links are designed to trick users into visiting potentially harmful sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 3

  • 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.
  • 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/coin-master-hack-app-ios-download-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-roblox-hacks-net_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-free-robux-using-html_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-game-hack-link_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/robux-giver_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/ios-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/ninja-simulator-roblox-cheats-for-xbox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-points_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/master-coin-free-link_GM406889139.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002fda.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FDA 10147 bytes
SHA-256: 1a4c5bb40cdb76f806fdfae7d7bcfef7a7f507ed7488238fc386b6cd114d7939

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