Malicious PDF — malware analysis report

Static analysis result for SHA-256 34e1beeebb2d1fba…

MALICIOUS

PDF

65.1 KB Created: 2020-11-14 22:19:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 25082c6a44adc27dbb338fecfbb7f2ca SHA-1: eefe041e9555c0e57e807cfc0863692a6b3b08bd SHA-256: 34e1beeebb2d1fba5764d4321d0184e3553bcea240dcb82808f69328449b4b42
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to leverage external resources for malicious purposes.

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://trafficel.ru/123?utm_term=663+area+code+canada PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5f9d79283f720.pdfIn PDF document text
    • https://xezujexowesujol.weebly.com/uploads/1/3/4/5/134502134/9063737.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374698/normal_5f91799236e8b.pdfIn PDF document text
    • https://kerijene.weebly.com/uploads/1/3/4/3/134367262/5adf3a0ad21.pdfIn PDF document text
    • https://gonerogad.weebly.com/uploads/1/3/1/4/131438616/2272835.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/gedimuta/beer_brewing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/goxudokujatunuzofejapuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/vativezefasedebosudujakit.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/un_bel_di_vedremo_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/grok_learning_answers_unimelb.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/marriage_application_form_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/cbse_class_12_physics_question_paper_2013_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/apk_obb_installer.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_off0000c4a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A5 4944 bytes
SHA-256: d6fc787b73a9f056cec910930089cca6366ba825d659ab6096cd33d3979f8ee8
font_01_sfnt_off0000d57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57B 10100 bytes
SHA-256: 1b2dd4ae6f77d3be792c5b46383d45e320d32a1bd4e7eb14d7d460db918f4783

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