Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cdd3979b937db3d…

MALICIOUS

PDF

66.5 KB Created: 2021-02-07 02:25:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ec19ee33fa97b9b6040ff5e96e9c5e96 SHA-1: df9a3bd544d5c6bf791e7b384ae4164eb92fb89e SHA-256: 4cdd3979b937db3d40f797e4a2684b73733d9ab8af69e5b3b417419df73ab83c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV and a machine learning classifier, with critical heuristics indicating it contains a large number of external links, characteristic of a link farm. The embedded URLs suggest an attempt to direct users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/123?utm_term=skye+name+meaning+arabic PDF link annotation
    • https://volafonozus.weebly.com/uploads/1/3/0/7/130775232/vidajagulogezumizi.pdfIn PDF document text
    • http://yazansoft.com/60734126989qc7im.pdfIn PDF document text
    • https://rababavuve.weebly.com/uploads/1/3/1/8/131871532/d165057298974.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/cheNBij/xagawewuxuwemejise.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxedanafowa/gwhd7ja/advisory_council_on_historic_preservation_section_106_training.pdfIn PDF document text
    • http://megalit-korolev.ru/jijerenubodanukazumodigc10yp.pdfIn PDF document text
    • https://kaxorude.weebly.com/uploads/1/3/4/0/134095875/roror_xivetaz_lizonogin.pdfIn PDF document text
    • https://cdn.sqhk.co/jedepazisu/hhbg6Pf/88835433293.pdfIn PDF document text
    • http://bcipreactivaperu.com/4d_octagon_card7n9r2.pdfIn PDF document text
    • https://zozetaxurumel.weebly.com/uploads/1/3/4/5/134590082/molif.pdfIn PDF document text
    • https://xemavuvewo.weebly.com/uploads/1/3/5/3/135394060/rodad_seteberata.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/icq6idT/21067073337.pdfIn PDF document text
    • http://marketop.club/jutubuwexbof1y.pdfIn PDF document text
    • https://dulodegusatoto.weebly.com/uploads/1/3/1/6/131636763/folazodar.pdfIn PDF document text
    • https://tukobigerokigab.weebly.com/uploads/1/3/4/6/134653943/lafumovojaruveb.pdfIn PDF document text
    • https://rejomopoxe.weebly.com/uploads/1/3/1/3/131383333/9665702.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/rodiligarexo/community_center_bundles_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/zapesuviropulotijenog.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/93795088279.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/chairing_a_disciplinary_hearing.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/viduzumitalejamev.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_off0000bbc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC5 4916 bytes
SHA-256: c1917cdb0a19807f7c723bcb6d96eb1cf341a8792d4baedb48b8e288d24657f4
font_01_sfnt_off0000cc62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC62 9896 bytes
SHA-256: 5e793d130acd99549464c9e0f92a7960f5e74d3101c5081aeedbf90f3ef26129
font_02_sfnt_off0000ee2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2F 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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