Malicious PDF — malware analysis report

Static analysis result for SHA-256 972e2664ced02c64…

MALICIOUS

PDF

68.6 KB Created: 2020-12-22 04:39:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 74a2425ed0d08f092ed40f9cace0be53 SHA-1: 6701e9f6f0d91d0a8165c1fb0277263cca9f27b5 SHA-256: 972e2664ced02c64e717db821ead5a0afd2d4e9dc9d78feb35fca4e74c844924
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to known malicious redirector infrastructure or are part of a link farm designed to manipulate search engine results. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/aws?utm_term=lamborghini+song+video++720p In PDF document text
    • https://tolafapod.weebly.com/uploads/1/3/4/4/134486806/jozigirudemunadut.pdfIn PDF document text
    • https://wiwetiforezopiv.weebly.com/uploads/1/3/2/6/132695432/64c83fd15c09b0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377380/normal_5f903bc57e005.pdfIn PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/1875403.pdfIn PDF document text
    • https://kaxebovirufuj.weebly.com/uploads/1/3/4/3/134399635/7fc8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380680/normal_5fa91f94a524c.pdfIn PDF document text
    • https://zirufifun.weebly.com/uploads/1/3/0/8/130874679/9407045.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc14bb05687f52b6b83d941/t/5fca6d477920841f0ed70121/1607101767844/rotten_to_the_core_lyrics_rudimentary_peni.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/shared_custody_agreement_template_nz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c9b1a5bc066edfa528b7/t/5fc0d87a3570fb44d122d6c7/1606473853644/19795945155.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/bikujimegokamoxiralegoj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce544693cc064e70e126e8/t/5fd137bcbc60b71bb1cfc618/1607546813913/7263381370.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10ac260f2895dc1e8a19d/t/5fc5933fcb3e0f57710f0a47/1606783809278/amazonbasics_mouse_software.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc597e6e9fc3622d541d4ab/t/5fc67035145a8629dc8eff67/1606840374370/unicorn_dash_online_game.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2cae0c30a162e0c5ec24a/t/5fc5497608845d0924389570/1606764918259/biology_quiz_questions_and_answers_for_class_12.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_off0000cbce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBCE 5836 bytes
SHA-256: 791cca08eb6d01748eb9e76b2272bcf9f087fa39730ce355cc8fe84e4c03f4a9
font_01_sfnt_off0000df89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF89 11364 bytes
SHA-256: fd5eeb9378c54da09d8af86385bbd329f75194d017f5df4bb398c5ef9392720a

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