Malicious PDF — malware analysis report

Static analysis result for SHA-256 48645104cd520593…

MALICIOUS

PDF

130.7 KB Created: 2020-12-01 08:27:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 18fe38bb32da411e134ab73779370209 SHA-1: 283ef005f54bcf60c56099d7e01b005e18039807 SHA-256: 48645104cd5205936bd954bf0b2a5bd571df8535eb536e010c6db10793f98763
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffmen.ru/123?utm_term=70+trans+am+ram+air+iv In PDF document text
    • https://wusafasugulub.weebly.com/uploads/1/3/4/5/134586051/762ea35b517.pdfIn PDF document text
    • https://dikajumexuw.weebly.com/uploads/1/3/4/3/134324924/9961672.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384483/normal_5fc4b3ff966ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391907/normal_5f98d0c43d07b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc36151a13a450bab040bac/t/5fc51ea1e18c5c478e9e89ac/1606753953668/charlotte_nc_high_school_graduation_requirements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee837281-7ed9-4c1b-9c41-ac31c789765e/32446537114.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d8d024b06a7eb3fedc56/t/5fc11da7f8cdb769c60af105/1606491560653/musically_crowns_free_no_surveys.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/55740094252.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/logudigumilefapofez.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10aaaf9866f3fd2d521c0/t/5fc25fb03485235c8613b93e/1606574000601/computer_networking_with_internet_protocols_and_technology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac44391b-348b-443a-b81f-9f56fd939a2c/2019-20_school_calendar_dallas_isd.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0feaf0a2757459be36412/t/5fc2d7193570fb44d1613183/1606604570031/56505794345.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf00b00f7af3919d232da/1606217740024/uc_essay_prompts_2019-20.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/350e241e-41a0-4e3a-ab89-48afb96b3acf/hamlet_summary_litcharts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baf6e487-2426-4c12-bc1f-67b0e67d3dcd/duvivozolisobifugugini.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A7F8 4988 bytes
SHA-256: 7d1551f1c10e3d79daa687d3bd41a8f60e064513ea1d61f59708b58b3eba243c
font_01_sfnt_off0001b8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B8DA 14180 bytes
SHA-256: f82a70f6b26d70cb606bd03663aabea6c18a80f8a65c7c7ac37568f94c683606
font_02_sfnt_off0001e8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E8D9 16060 bytes
SHA-256: c43c81af3addadc619f1b50b0eb79006c69e58cb90abf43f7a5fbd940e22698c

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