Malicious PDF — malware analysis report

Static analysis result for SHA-256 8077dcf67380ffcb…

MALICIOUS

PDF

44.5 KB Created: 2021-06-04 01:24:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4e5bee3ac01646f1e8ddfb37c8dafe3c SHA-1: 5252e24e41926592a2977ec58139b4ffd6d61693 SHA-256: 8077dcf67380ffcb0d82b81786325ee77e5fe02cbcd533eb8f807bcbbee12f44
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors, including one that masquerades as a "free generator / game hack" for Minecraft. The document body, though heavily obfuscated, contains references to the same malicious URL. The presence of these links and the ML classifier's high confidence score indicate a high likelihood of this document being used to deliver further malicious content or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/479516143/minecraft-free-download-pc-game-hack In PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/worst-client_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/robux-best_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/dailyrobux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/abd-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-download_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005055.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5055 25808 bytes
SHA-256: fcca80bc9e97f0e67312240b4b73e5f42bdef125c9107d73a37e2182066f9f1f
font_01_sfnt_off00008ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD1 18444 bytes
SHA-256: 064b6ae6fa3971595f13ccf6914158de219c664ec1a7cfca763d46b46d8283c4

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