Malicious PDF — malware analysis report

Static analysis result for SHA-256 56ca5cb771f11692…

MALICIOUS

PDF

78.8 KB Created: 2021-03-31 14:36:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4b92a8ad9ffdcf6e1ca331c71d8a6b5d SHA-1: ee878cbb51be0406e5fe4dce449b39b3c43132d5 SHA-256: 56ca5cb771f11692b3471e7fccdc4a754d6fa069a01895d5630b2793ee4ba833
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-themed, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=3d+pleated+face+mask+pattern+pdf PDF link annotation
    • https://sepiboberad.weebly.com/uploads/1/3/1/1/131164555/filozavanobabisezux.pdfIn PDF document text
    • https://lefiluke.weebly.com/uploads/1/3/4/8/134887161/1172685.pdfIn PDF document text
    • https://kitupiver.weebly.com/uploads/1/3/4/4/134446404/begew-wipusav.pdfIn PDF document text
    • https://xoputiwi.weebly.com/uploads/1/3/1/4/131438532/lerurukejudofanegu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vulomalizekuvu.rf.gd/zuzaren.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/zirubebamefiravemu.pdfIn PDF document text
    • http://vagunodu.rf.gd/word_to_filehippo.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/arterial_line_removal_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68d5d568-86f3-4c82-9cd6-d6286eed7406/zozuwarigunas.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/desert_island_survival_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/98520603290.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/882c6b83-2970-400c-8751-65c87540cd66/guteroxugudowewopivop.pdfIn PDF document text
    • http://zosunofurokor.rf.gd/9331784801.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/dodecahedron_template_illustrator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a440843-70da-4941-8c22-b8cd248cd355/seresujonazumuwabidumu.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/puwor.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/open_source_pc_performance_benchmark.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/routing_protocols.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/lixorevare.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/what_are_the_5_most_important_events_in_us_history.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/lenufisiriditalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e3b0381-c601-4118-b75d-3c15b9ed573a/xibunutulirojewawut.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_off0000f51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51D 5436 bytes
SHA-256: 6af1cb6141c454dab35c29237e4484b8f8a8b6a745604b28b65fa26f4dbf1556
font_01_sfnt_off00010784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10784 11348 bytes
SHA-256: edde9e9cb40f06939bf66275bb3004613ae04fcefc6bf852becce284b43f6712

Open this report in the interactive analyzer, or submit your own file for analysis.