Malicious PDF — malware analysis report

Static analysis result for SHA-256 28e0af2e299065cc…

MALICIOUS

PDF

42.9 KB Created: 2021-06-03 12:52:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 7d6cddc7cd3a11a004b9f6b29b6a8d13 SHA-1: 404ee25ae64d42b57275d12dad6b0a6313da391a SHA-256: 28e0af2e299065cce3a722fbaaf33112d9fcd0e0031e2e4cfd9e4bd7594cd52d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating it links to malicious redirectors and is designed as a lure for game hacks. The embedded URL, 'https://netcdn.online/app/431946152/greasyfork-roblox-hacks-game-hack', is directly associated with these malicious redirector findings. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 https://netcdn.online/app/431946152/greasyfork-roblox-hacks-game-hack In PDF document text
    • http://katalog.ireyogya.org/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-link_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-800-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005192.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5192 27152 bytes
SHA-256: 3dd1afd2274042a20fd90aacd688532b903e34be748fa83bf9b4a6da303371f8

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