Malicious PDF — malware analysis report

Static analysis result for SHA-256 e85772685fecef19…

MALICIOUS

PDF

72.0 KB Created: 2021-02-12 14:33:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5d6ef34e8600504d32baa0225675726f SHA-1: 3d3f7446448f23051f4ed3d5540c81685fcbe63f SHA-256: e85772685fecef19185af07d585076236229321689f26fd068e65d44e57e9bd8
156 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. 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
  • 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.
  • 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://crophysi.ru/123?utm_term=revo+pride+scooter+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412158/normal_5fd661a7f4091.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479254/normal_5fc8751046023.pdfIn PDF document text
    • https://nutuvujupakumap.weebly.com/uploads/1/3/2/7/132740288/sinegovakere-valajarax-vasamesodog-mixokometuk.pdfIn PDF document text
    • http://purigoguwoz.22web.org/gukepojafakuwibirema.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413361/normal_5ff37dcc85cb3.pdfIn PDF document text
    • https://segamivudafipem.weebly.com/uploads/1/3/2/7/132740242/1597921.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415334/normal_5fe67375267a7.pdfIn PDF document text
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/4488421.pdfIn PDF document text
    • https://nafezukame.weebly.com/uploads/1/3/2/3/132302716/dimitimedawopuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jimakobogugiwa.epizy.com/juzomujumadobug.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/bhp_billiton_limited_financial_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/dukikawebomoje.pdfIn PDF document text
    • http://xixupokolaxusuv.epizy.com/google_sheet_pivot_table_slicer.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/rc_truck_brushless_motor_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/albany_med_patient_information.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/leveling_guide_vanilla_20-_30.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/jodonarezetivugadusi.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/36423319841.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F2 5284 bytes
SHA-256: a9171cfcfc6e95c5817004484208eadd92bc03acf43bf9047f3b685190bc9cb1
font_01_sfnt_off0000ebdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDC 12172 bytes
SHA-256: c89092cca00f00e32e28228a218e66dc13b1991720563365e5bb949d0e73fa3d

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