Malicious PDF — malware analysis report

Static analysis result for SHA-256 eabf90c99e79a5e1…

MALICIOUS

PDF

78.1 KB Created: 2020-12-27 08:55:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5f59c20066ee0d47d1a2eb15f2b5d3e0 SHA-1: 78305c616c606467870509adac4f674f84770f76 SHA-256: eabf90c99e79a5e1ba44a4bca79ec3f87e9e8879c60d78b9d252f9aaa3a08122
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, including a link farm, suggests an attempt to redirect users to potentially harmful websites. ClamAV detection further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/strik?utm_term=the+impossible+quiz+book+chapter+3+wiki PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388041/normal_5f989c1994d52.pdfIn PDF document text
    • https://gimelukisisira.weebly.com/uploads/1/3/4/0/134040832/d48aa0c.pdfIn PDF document text
    • https://dikoriwapajok.weebly.com/uploads/1/3/4/4/134447187/4302150.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370768/normal_5fcd59ba89b30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387567/normal_5fe3196594f8d.pdfIn PDF document text
    • https://fofirajajamide.weebly.com/uploads/1/3/4/6/134643930/5274063.pdfIn PDF document text
    • https://kunudixi.weebly.com/uploads/1/3/4/6/134667289/nukiwisunipitem_xuxex.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/miwolezedubujoz/tovukuziwedevef.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/visofiti.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/cuddle_buddy_application.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/21811928749.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/95797479034.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_off0000e3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F3 5536 bytes
SHA-256: 7057a2b78f8feaa0d426e86350054f8d5ec16eb96f6beddad477504f0057867e
font_01_sfnt_off0000f6dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DC 11340 bytes
SHA-256: 30e62ac2b91852cf278a6df9a50a9e57b408baca8c84339b9f08a002f81527c0
font_02_sfnt_off00011d21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D21 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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