Malicious PDF — malware analysis report

Static analysis result for SHA-256 721909cad9f82d2c…

MALICIOUS

PDF

43.6 KB Created: 2021-06-11 10:46:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 7a784618a5be2eaa25360a4ac0a82935 SHA-1: 762144045805d827b760248428e537031247976b SHA-256: 721909cad9f82d2c4243921bbae872aa263688d94fcfd7ffff935cfa07effaa2
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free generators. The document body, though heavily obfuscated, contains references to these lures and embedded URLs. The primary malicious activity observed is the redirection to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.tw/app/431946152/youtube-roblox-how-to-get-free-obc-game-hack In PDF document text
    • https://eleganceautospa.ca/images/minecraft-114-download_GM479516143.pdfIn PDF document text
    • https://eleganceautospa.ca/images/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • https://eleganceautospa.ca/images/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://eleganceautospa.ca/images/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/roblox-free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/how-to-become-pubg-uc-seller_GM1330123889.pdfIn PDF document text
    • https://eleganceautospa.ca/images/minecraft-pe-hack-client-ios_GM479516143.pdfIn PDF document text
    • https://eleganceautospa.ca/images/free-followers-for-tiktok_GM835599320.pdfIn PDF document text
    • https://eleganceautospa.ca/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/hack-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/oprewards-points-generator_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/hack-coin-master-ios_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
stream_004_off00004ea1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EA1 24716 bytes
SHA-256: f63753128f2f594444b950bcf59db8e2b8ab44d1edf94798cf856ec1dbd6fbae
font_01_sfnt_off000086d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86D6 18516 bytes
SHA-256: b1df600e02e715223fc549a8ca3ee456fa5d89d4cbb9160ab9fd17b9e26d7cc5

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