Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb4ffef6e529842e…

MALICIOUS

PDF

80.8 KB Created: 2021-05-08 13:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: eacbed07d5b9bc76a2dcc7a1cca1cc25 SHA-1: b643d986f0cb22181342817bd50df021a4ddeb86 SHA-256: bb4ffef6e529842e1b141b867d1b181fe36b40acf5c8874d8e6c0c02683ced58
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The presence of the URL 'https://vilenefex.ru/strik?utm_term=can+i+update+my+panasonic+viera+tv' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly indicate a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and link farm suggest it's designed to redirect users to malicious content.

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://vilenefex.ru/strik?utm_term=can+i+update+my+panasonic+viera+tv PDF link annotation
    • http://luwinilulurop.mywebcommunity.org/isound_bluetooth_speaker.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449627/normal_6021adbf743c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495551/normal_601585c1772ed.pdfIn PDF document text
    • https://limezisetuf.weebly.com/uploads/1/3/4/8/134871661/dalol.pdfIn PDF document text
    • http://wapadax.scienceontheweb.net/84265308951.pdfIn PDF document text
    • http://wuramegojuluz.mywebcommunity.org/23328736784.pdfIn PDF document text
    • http://posurazatux.mypressonline.com/data_acquisition_systems_from_fundamentals_to_applied_design.pdfIn PDF document text
    • https://dokupikojezox.weebly.com/uploads/1/3/4/7/134740590/pokadixuxaju-pukigowo-jawipiwa-sutedulewur.pdfIn PDF document text
    • https://lelifomokul.weebly.com/uploads/1/3/4/6/134618459/e8fe3ebc677815.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/nazekisigiduz/graduation_hat_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/muslim_girl_name_list.pdfIn PDF document text
    • https://2ac8321c-28d8-41c8-ac7a-99137a6fe030.filesusr.com/ugd/157ee0_3f8da6bececc45f5a0542b53af390575.pdf?index=trueIn PDF document text
    • https://c2963e02-5f2a-49ff-bb4d-22715b80ab3a.filesusr.com/ugd/55efe4_3f2bb0bf24a14da798c1c516907ebee3.pdf?index=trueIn PDF document text
    • https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_1f4f94be6293430780fb48e79f03a704.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/resisuna/lerelabar.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/75175081217.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/denakimipeb.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/biziwivovarobazi.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/50996083782.pdfIn PDF document text
    • https://ea64ff4c-51e6-4efc-8cc1-399682447901.filesusr.com/ugd/961f18_bbd9809d1cc94f28bd5a2b20f6dc04f2.pdf?index=trueIn PDF document text
    • https://e4da1597-3bb3-488b-9226-7c2c9e06e9ce.filesusr.com/ugd/db5d73_e7588ce840d44f6e9b4e04a08c563be1.pdf?index=trueIn 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_off0000fd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8E 5256 bytes
SHA-256: 4c43cd1d83d2d2741402867066ae212d45740f9c24cf2eac054650edf2dd8620
font_01_sfnt_off00010f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F62 11128 bytes
SHA-256: d39f002663c10e1b809774697eee2dffb2c6f10ef06b076fc33c116c092b66dd

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