Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f36302a91e8334f…

MALICIOUS

PDF

71.3 KB Created: 2021-03-27 10:55:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e4c6877c723e2926ce049d1593cce463 SHA-1: 590453b3785bc65514b8a3255118a64f77e21648 SHA-256: 6f36302a91e8334fa0b6a043325509b28e706f65fe5a5bd910899808779d16f1
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 0.9991

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://jacksth.ru/wix?keyword=ravenna+school+district+jobs PDF link annotation
    • https://cdn.sqhk.co/nasubivapu/hjjijjO/relirivunomamerodom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478952/normal_5fdff1a40671a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457330/normal_605918b49662e.pdfIn PDF document text
    • https://judozonax.weebly.com/uploads/1/3/1/4/131454501/zipanededa.pdfIn PDF document text
    • https://noduxexoretan.weebly.com/uploads/1/3/5/9/135993764/zipiwebosofuroxidage.pdfIn PDF document text
    • https://cdn.sqhk.co/nokowifupe/iLUtNku/7310997270.pdfIn PDF document text
    • https://cdn.sqhk.co/zikufojigox/YjdGAgj/dunotutugurefiwus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422620/normal_5fd7b4ec47433.pdfIn PDF document text
    • https://vakilelem.weebly.com/uploads/1/3/1/3/131379598/nifuvaf.pdfIn PDF document text
    • https://marodesama.weebly.com/uploads/1/3/5/3/135349202/1571555.pdfIn PDF document text
    • https://nutajutibasetak.weebly.com/uploads/1/3/4/6/134638930/403282.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8650d040-a33d-467d-a608-6706f181f11b.filesusr.com/ugd/61b8bf_573a0c49be0c4a9286c1e72ca639ab27.pdf?index=trueIn PDF document text
    • https://899154e9-876a-4ab4-94d5-c8ef2aed10f2.filesusr.com/ugd/dcf9ad_f246782f88514f44b862a6606f11d497.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fizup/68335241248.pdfIn PDF document text
    • https://2903667b-e544-4972-ac7f-e5855aaa9b37.filesusr.com/ugd/2cc660_6812027296dc455f8d066916a1c01d50.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/resume_writing_guide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/lm358_so8_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/27095699038.pdfIn PDF document text
    • https://5c839259-519f-4cee-a1a2-6639d654070b.filesusr.com/ugd/140efa_85af43aab41846ab85bbc9d67e407c2f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/jajusiwatakiteza.pdfIn PDF document text
    • https://229c0a76-8cd2-4a6d-ad64-a548a1436bbb.filesusr.com/ugd/f9ed01_2b150b4494eb4bf4bbe7f4d2ce35380d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/online_magazine_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/ugc_report_on_higher_education_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/3871744493.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C6 5312 bytes
SHA-256: b05fdcb1a176b3e130e10958c0cb8007eadaa1fbb0a82a56a8f8f3325687b981
font_01_sfnt_off0000ebd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD7 10432 bytes
SHA-256: 53a5b5476566de3cfbae4904ad6035fff0f6fc01c9867c84a290654bf229f078

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