Malicious PDF — malware analysis report

Static analysis result for SHA-256 75bfd9b86b4a500b…

MALICIOUS

PDF

44.7 KB Created: 2021-05-16 03:08:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 6928c1a29c190bc3799b46cec7aab71f SHA-1: 75f26ceec241835955d981e76df3f651085ad89d SHA-256: 75bfd9b86b4a500b50a298bc1e1c234e1053d9dafdceb31e0ea699fdd570227e
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded links that redirect to malicious infrastructure, specifically promoting 'free Robux' or 'game hacks'. The document body and heuristics indicate a lure designed to trick users into visiting these sites. The presence of multiple links and the critical heuristic firings strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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
  • 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-without-downloading-apps-game-hack In PDF document text
    • http://gomelavto.by/images/how-to-get-free-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/are-there-any-coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-link-app_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://gomelavto.by/images/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-20-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-time-hack-ios_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_003_off00004b45.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B45 25924 bytes
SHA-256: abccb8a3ce7b49915848a722b73612fabcfdb4fef5f37c0149736f5142db47a8
font_01_sfnt_off00008799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8799 19876 bytes
SHA-256: 7dd9be13e4665f5a35086e4b23dd28e6d3ecc39135d95cb28b9ae9c86552181a

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