Malicious PDF — malware analysis report

Static analysis result for SHA-256 66287f0c774e8862…

MALICIOUS

PDF

74.9 KB Created: 2021-04-08 06:17:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a2f64e6c9504d809b4f10f7a00875c9 SHA-1: ae3981466c63695ff4b26b0fd37b397b39d551a7 SHA-256: 66287f0c774e88623daf36785b9309b11fe7ecfd96cac7ff08239c13542023f5
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly indicate malicious intent, specifically identified as phishing. The document body, though heavily obfuscated, contains text related to 'Hot wheels 4 lane raceway ebay', suggesting a lure to attract unsuspecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/wix?keyword=hot+wheels+4+lane+raceway+ebay
    • https://niromovikusuzu.weebly.com/uploads/1/3/4/6/134651616/ragut-waziwut-dodufefew.pdf
    • https://gunupilerupuva.weebly.com/uploads/1/3/1/8/131871796/dizewu.pdf
    • http://zomaragexavope.sportsontheweb.net/rafametepogijilidaposow.pdf
    • https://lafajadisevo.weebly.com/uploads/1/3/1/4/131454770/vitafutebunugas-kiwen-risisa-damiduxewonawo.pdf
    • https://cdn-cms.f-static.net/uploads/4393485/normal_60586d84931eb.pdf
    • http://xipodijajul.sportsontheweb.net/1472776102.pdf
    • http://sutobep.getenjoyment.net/lateral_thinking_examples.pdf
    • https://static.s123-cdn-static.com/uploads/4485929/normal_5ff1cc0dabb71.pdf
    • https://nawexolaka.weebly.com/uploads/1/3/4/7/134704757/riletedi.pdf
    • http://juxowupekabaf.mygamesonline.org/97081016006.pdf
    • http://fodekofuxuvum.sportsontheweb.net/oceans_piano_chords.pdf
    • https://static.s123-cdn-static.com/uploads/4405193/normal_5ff12be43fb65.pdf
    • https://static.s123-cdn-static.com/uploads/4459057/normal_5fed5622584f3.pdf
    • http://lafilubepojev.scienceontheweb.net/how_to_print_avery_5160_labels_from.pdf
    • https://visopitolunew.weebly.com/uploads/1/3/1/4/131483219/dagamimurobi-juput.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7162416e-a815-4e2e-b4b4-2f1b6d3d7a1b.filesusr.com/ugd/0723a7_a66f5a37d252418eb73d6c42462d1a1a.pdf?index=true
    • https://s3.amazonaws.com/rodiligarexo/towujatuzugifegubiri.pdf
    • https://s3.amazonaws.com/matogapibelifiv/mixefumobunakig.pdf
    • https://35548484-ce42-4b18-9d9d-834326683263.filesusr.com/ugd/a221b6_b6b3fd92f67f4f29bf5acb1a722cba0d.pdf?index=true
    • http://moxuzaridob.onlinewebshop.net/89739021329.pdf
    • https://cf268418-7549-4780-9cff-e39e61b5276c.filesusr.com/ugd/0b1cf2_db6032c2db5546c69c79d59ce5332ed0.pdf?index=true
    • http://tapoloferazuziw.atwebpages.com/jemiri.pdf
    • https://s3.amazonaws.com/pezofut/44001855448.pdf
    • https://s3.amazonaws.com/regovadeje/chrome_os_latest_version_iso.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e687.bin
9269638cfa1469b46b23798c4b36112ba418db953363edde59571fbecbaa3d06		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE687 5272 bytes
font_01_sfnt_off0000f888.bin
903bf2022540d889b06ede1ca85093ef250284ffe89c8f5720f96e5ad03daad4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF888 11052 bytes

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