Malicious PDF — malware analysis report

Static analysis result for SHA-256 a333859e2d5d97b9…

MALICIOUS

PDF

82.0 KB Created: 2020-12-30 13:41:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 8dbcea6c5cb7ee2c0a1ff6a70c4958f0 SHA-1: 6d5c7765a1edc0bfde7b702525ae3758ef2a9c08 SHA-256: a333859e2d5d97b9ca9e3c3dbda97951719b841ee626a5855c5f9448f45bc6f8
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF SEO link farm. One of the primary links points to 'trafftec.ru', which is likely part of a phishing or malicious content distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/strik?utm_term=myths+and+history+of+ancient+greece+podcast PDF link annotation
    • https://poxotedodesogin.weebly.com/uploads/1/3/4/3/134305686/legudafoles_mujog.pdfIn PDF document text
    • https://ponebivilu.weebly.com/uploads/1/3/4/5/134505494/vejilamoweluwe-karirutadur-nepujubokoradot.pdfIn PDF document text
    • https://cdn.sqhk.co/jivaduzar/XbRdHnA/call_of_duty_warzone_apk_download_for_pc.pdfIn PDF document text
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/ligimurutaz.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/8921dda1fca9.pdfIn PDF document text
    • https://rizenuwav.weebly.com/uploads/1/3/4/3/134335920/daramiwuj.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/ogeVzij/konevirutaxebu.pdfIn PDF document text
    • https://zipibolusoxa.weebly.com/uploads/1/3/4/6/134627603/madetokenadevezaga.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/febopa/latex_bibtex_cite_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81172b1a-dbed-44d3-bb0a-7a5565cf4c63/wekatewepuwulisupu.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/constitution_study_guide_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/subject_verb_agreement_notes_and_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/cms_billing_guidelines_for_home_health.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f49d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49D 2884 bytes
SHA-256: 080523b93cb10917511bb9d0d532e034ae221660043f2e1f0d51861c3039aa59
font_01_sfnt_off0000fedb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDB 5492 bytes
SHA-256: c969239681b6c86dc4eeda2d3cab683cc83833957aace4cfbe59c40a11204a2d
font_02_sfnt_off0001119e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1119E 12704 bytes
SHA-256: 98ac5da1c2d6d40b7d66fa1560bc388a7fc54d7e2d991a5f8af5acf4ac7fdad0

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