Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac8110b2649d48d1…

MALICIOUS

PDF

45.6 KB Created: 2021-06-03 22:34:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2446a1d606a8e3dec3ce821f23fef6fd SHA-1: 14bca1b98462792ab4c037ad35b98a623df9bb1f SHA-256: ac8110b2649d48d12f9a83b903295a3fb27161aa9004a613ec8644027b2e4d9f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The document body, though heavily obfuscated, contains similar text and URLs, reinforcing the phishing pretext. The presence of embedded URLs and the nature of the lures suggest an attempt to trick users into visiting malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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/479516143/how-to-make-your-own-minecraft-pe-server-for-free-game-hack In PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/roblox-source_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53BE 25416 bytes
SHA-256: b9b8eb5e36000d6243addcb4c8f99e0927f4fcfb82e2a46281cdddbe879f8dcb
font_01_sfnt_off00008d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8D 2820 bytes
SHA-256: 34dd21cbcbbf8680f9624d5ddfa25e49232e6768200f74ddacb5347fd7a5f6dc
font_02_sfnt_off0000972e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x972E 18616 bytes
SHA-256: 7f1ed811d94b63e364c058ff1b231f2e8228461263d94dfafa7c0dfe2cf4e047

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