Malicious PDF — malware analysis report

Static analysis result for SHA-256 92f599df5882f73c…

MALICIOUS

PDF

75.1 KB Created: 2021-02-27 11:00:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: dc30f25e507a68bfecc81dc127647d71 SHA-1: f69bf8ef5461d703ac63d30a91c2475a79d7430e SHA-256: 92f599df5882f73c5b51459e97a4bb6d87e6b0a34d72be043ddd56022e26bb78
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains a large number of external links, many of which are likely part of a link farm designed to direct users to malicious sites. The document body, though heavily obfuscated, appears to contain search-related keywords, suggesting a lure to trick users into clicking on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/strik?utm_term=best+whirlpool+dryer+repair+near+me PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411717/normal_5fcfb3029591e.pdfIn PDF document text
    • http://xawegap.mywebcommunity.org/samugu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372960/normal_5fde7bccd5010.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456984/normal_5ff42d580f0fc.pdfIn PDF document text
    • http://bionatur.space/arcane_quest_legends_full_apk_moda3nex.pdfIn PDF document text
    • http://winsl.space/65118050373sylq1.pdfIn PDF document text
    • https://dusomekekonipa.weebly.com/uploads/1/3/4/5/134580960/wibagage_zujizuxisupe_sibadezibawijap_zipisowogeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385424/normal_6003304635ef1.pdfIn PDF document text
    • http://chestlune.online/528275525456z5ql.pdfIn PDF document text
    • http://obschee.xyz/ritevedelenoyo1zr.pdfIn PDF document text
    • https://bibutijelogoper.weebly.com/uploads/1/3/2/7/132740620/5723108.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381541/normal_5fd7a51193ee3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://geforagegi.atwebpages.com/cellular_and_molecular_immunology_abbas_10th_edition.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_off0000ea34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA34 5444 bytes
SHA-256: aa5c9e56fa651e13a530c6cff73db6fbc97de2c2769e3f971745bed426abad89
font_01_sfnt_off0000fca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA2 10356 bytes
SHA-256: 6cd4135efd28a3edc5e1088a093d982991f3a6b92b637a4056680f7628372057

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