Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf5eb084b6c46fa…

MALICIOUS

PDF

65.3 KB Created: 2020-12-06 14:48:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5ff5bdb455d294bbb2f05b74aab188b7 SHA-1: 26c0ca91d4ad39d15d88a5c9c725a5735d8943e1 SHA-256: eaf5eb084b6c46fa6ff07b0496c87090cf9ae0090bcd0c78dde02c80f0bcfee0
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://traffnew.ru/strik?utm_term=ski+boot+dryer+nz PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393890/normal_5f91210fe0bcd.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/9b03855b72dcb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479705/normal_5fbd905869a1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456685/normal_5fb699762e660.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386849/normal_5fbb44838141d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1bb1566-5227-4095-9640-7906eecb2374/pathfinder_creature_sizes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f4ce195-0e2e-46ee-83d8-4246ea5943a0/37628628621.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc15a3c60f2895dc1eafeb7/t/5fc358373485235c8631b776/1606637625430/plant_high_school_tampa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98a66a55-f051-49a5-9efe-9e3b71c09d68/ang_probinsyano_july_11_2019_full_episode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a1bf591-309a-4884-b374-415f1d2e05a5/xatasotina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/818b548d-938d-4860-ab57-f0476f6c7e1e/online_clash_of_clans_hack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54b7393f-ab39-4e19-98cf-be5643e7e600/36640521634.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_off0000c30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC30C 4860 bytes
SHA-256: 6006f6c4a05b07977490dfba629320e25c3792d79e67282df9a85b63d3921dd3
font_01_sfnt_off0000d3b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B6 10888 bytes
SHA-256: f4d2cc66af65e527726359d61400a2a00c98e16f4a4b1dc0d2eb979614748271

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