Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d2cbe90a65827db…

MALICIOUS

PDF

93.8 KB Created: 2020-11-22 03:40:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f3a5d549d0476940cc8a3e3dd24165e8 SHA-1: 9d272c54ee9117ba80619de53959502a28177b38 SHA-256: 6d2cbe90a65827dbaefd28d8f9ae45ca1e3e18fef03f217023daa34ea661d3ae
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://traffking.ru/123?utm_term=plu+pool+summer+hours PDF link annotation
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/6741250.pdfIn PDF document text
    • https://suwanozafedo.weebly.com/uploads/1/3/4/5/134587456/ditakuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408865/normal_5fa9d73a688b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426677/normal_5f9dd230f0452.pdfIn PDF document text
    • https://vomenipof.weebly.com/uploads/1/3/4/5/134585177/7571565.pdfIn PDF document text
    • https://lobevebuwavija.weebly.com/uploads/1/3/4/3/134394718/8b496.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jusuberu/nezumeka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a47a327-1845-4183-856a-0ace01731d13/minecraft_pe_v_10.5_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22692437-1a5a-46a4-b9ad-7ef911edac53/464352783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d10d16fd-51e3-496b-bbf1-6882a9552edc/ruzemiresaguluraluve.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/pesubememaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db936d4e-a6b1-48d1-a317-050e922fb460/newest_movies_hd_2.4_apk_for_firestick.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92509206-afe3-4dc5-985d-6630e20a2b04/present_tense_spanish_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f8a2746-4896-4299-8df6-abc52cb6a1d5/enchanter_leveling_guide_everquest.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_off000131f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F4 4852 bytes
SHA-256: 644d658f9e5b0ac846878d1f78a8377cb4e452490a5e5451ba1c1dfedb4f7cc6
font_01_sfnt_off00014243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14243 12144 bytes
SHA-256: 222aa9fbc09629eafb74b244f4ebc84c7db0d0c438a2f1012b46d04d2456c162

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