Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d9100be100ad6a3…

MALICIOUS

PDF

84.2 KB Created: 2021-04-18 20:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e90f38698d2ea0b7319c03f588ab9b01 SHA-1: de85c941601f68907b31910621dff68f29b954c0 SHA-256: 9d9100be100ad6a3e266753b0b7818124cd7c431d9dec446aee053ae9519dac4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://seumenha.ru/strik?utm_term=serato+dj+pro+software+%2528instant+software+download%2529 PDF link annotation
    • http://gagitevanonuti.mywebcommunity.org/68879319699.pdfIn PDF document text
    • http://devgame.design/57917877191dfu0o.pdfIn PDF document text
    • http://motivawka.online/timiromibodutasaxk9jyj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuzelewekupe.epizy.com/psd_to_file_converter_online.pdfIn PDF document text
    • https://d0bf7e8b-5449-41c0-93e9-161603c0719f.filesusr.com/ugd/197ed4_2a5fa0d3489a4c96ac708817c9ccf134.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/143dbfd7-d522-4696-ba1a-79097532d56e/gcf_lcm_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/what_does_a_management_consultant_do.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/safety_1st_expiry_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/857bb9f1-60d0-4f3b-8dfd-4acf322a5afa/skyscan_atomic_clock_86722.pdfIn PDF document text
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_5d86c9fb95c941b2a5977d5ab21ad2d7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/community_service_log_sheet_word_document.pdfIn PDF document text
    • http://pefimubis.myartsonline.com/behold_your_god.pdfIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_472e35db8a28476699aa033ffc7ca9d7.pdf?index=trueIn PDF document text
    • http://mafovito.rf.gd/lakewemadovokid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c855f26f-4598-47e2-ae46-91e6fbae9690/13544489128.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32A 5460 bytes
SHA-256: b84930f64b08cfbeb6d19deb6397f45d0326570cd6a002fcb3b35a3b9a496ca9
font_01_sfnt_off000105eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EB 11032 bytes
SHA-256: bccbf59847399c4ce8b98d2b3963dccf3a507fd6fad3a9fbf59a6477dc3646f4
font_02_sfnt_off00012bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC9 16232 bytes
SHA-256: 518caaef23ff38dffd173390deb2ebbf4fc7588f1930709da0bf1b0df588cfea

Open this report in the interactive analyzer, or submit your own file for analysis.