Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d248bc0f69d5139…

MALICIOUS

PDF

44.1 KB Created: 2021-06-04 03:22:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 822594470d5a9a3ffbc4a21f75b130c0 SHA-1: 87eb111d21615594ae7bebacda8e6bd713d4810f SHA-256: 1d248bc0f69d513966a0ec9be44c5eff5bc92c3ee707e2e6a68d25e60b746deb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting "game hacks" and "free generators" to lure users. The primary redirector identified is https://netcdn.online/app/479516143/hack-minecraft-game-hack. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious redirector chain designed to lead users to potentially harmful content or further malware downloads.

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/hack-minecraft-game-hack In PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-hack-injection_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-daily-free-spins-blog_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/robux-earning-sites_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/pokemon-go-free-account-generator_GM1094591345.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-hack-https-coinms-net_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_off0000539a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x539A 24600 bytes
SHA-256: 2bd12610667d9724754a2d8598c732130152479c6ada9a37dd0fec2ff42c4015
font_01_sfnt_off00008b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B6C 17740 bytes
SHA-256: b48554faafe2bce709b64b5b5bb2139c5dbee2e20b18b96283c95ec436c1b8f7

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