Malicious PDF — malware analysis report

Static analysis result for SHA-256 be7fe53f1e4d59e7…

MALICIOUS

PDF

41.4 KB Created: 2021-05-13 07:33:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1d4a864443db8869bfdb6862d0f7c4b5 SHA-1: 2e43da48ff1161f1991802b6b36bc85491cb606e SHA-256: be7fe53f1e4d59e721db85afb440b97721c6a286da3113a9eea50612c8b6dc94
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free Robux or game hacks to trick users into clicking malicious links. The document contains multiple embedded URLs that redirect to known malicious infrastructure, ultimately leading to further malicious PDFs. The primary attack vector appears to be social engineering via a phishing lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.xyz/app/431946152/free-robux-generator-no-human-verification-or-survey-2021-game-hack In PDF document text
    • http://spentulib.com/search//repository/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search//repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search//repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://spentulib.com/search/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search//repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • http://spentulib.com/search/repository/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://spentulib.com/search/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://spentulib.com/search//repository/play-minecraft-free-online-no-download_GM479516143.pdfIn PDF document text
    • http://spentulib.com/search//repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search//repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/spins-coin-master_GM406889139.pdfIn PDF document text
    • http://spentulib.com/search//repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search//repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/coin-master-free-cards-and-spin-link_GM406889139.pdfIn PDF document text
    • http://spentulib.com/search//repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/coin-master-unlimited-spins-apk-free-download_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_003_off00004beb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BEB 25432 bytes
SHA-256: 8743fd2c08bd88bb1c534eaf74dc929e159e83e79564fa1b63a5746153a494e5

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