Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea2bc0f04e014c7…

MALICIOUS

PDF

41.8 KB Created: 2021-05-18 03:02:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 57cfa727f4aa317474a2b2a445c302eb SHA-1: b57d8db97a6123711dd164f4e515146c74ba6f5e SHA-256: 0ea2bc0f04e014c7c030bef8eaf688d72bd9c4c7d3f72aa061855e644dbfb632
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are structured as SEO link farms, suggesting a deceptive intent to drive traffic. The document body, though heavily obfuscated, contains URLs that appear to be lures for game cheats and hacks, such as 'free-minecraft-com-game-hack'. The presence of PDF_URI and PDF_SEO_LINK_FARM heuristics, along with the ML_NYX_PDF_MALICIOUS flag, strongly indicates malicious activity. No scripts were extracted, but the overall pattern suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/479516143/free-minecraft-com-game-hack PDF link annotation
    • http://pesok-rk.ru/images/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/coin-master-game-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/pig-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/how-to-play-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://pesok-rk.ru/images/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/coin-master-free-spins-cheats_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/how-to-hack-coin-master-with-game-guardian_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/free-coin-app_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/free-robux-that-actually-works_GM431946152.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_003_off0000496e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x496E 24932 bytes
SHA-256: ba7f04ccfde085936a49da2402c405299de048df6578df6955a42da1b7dae24a
font_01_sfnt_off00008211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8211 17968 bytes
SHA-256: 1b4885c2af39899205e5d90bbae948db42423f4b52ef91d34878d66166ac5d9f

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