Malicious PDF — malware analysis report

Static analysis result for SHA-256 90358917695085bc…

MALICIOUS

PDF

64.3 KB Created: 2020-12-19 13:20:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 26f5a1cd27f6dd76ff01292726957059 SHA-1: 569e9d2430ab4dc125a2a46357d962780db54a84 SHA-256: 90358917695085bc887c2640ddca8bb94214917553bf565879a7184cd6728046
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a PDF link farm. One of the primary URLs, 'https://traffset.ru/123?utm_term=earnest+money+agreement+form+washington+state', suggests a phishing or scam attempt by impersonating a legal document. Although no scripts were explicitly extracted, the presence of PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS heuristics, along with ClamAV detection, strongly indicates malicious intent, likely involving redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/123?utm_term=earnest+money+agreement+form+washington+state PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369915/normal_5fce3fddde4c4.pdfIn PDF document text
    • https://pevinuwipe.weebly.com/uploads/1/3/0/8/130873962/saloru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478127/normal_5fc965beca78b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b08292c8-5167-49d7-89cb-0142992ecbb6/lebepanezafakawotiwivo.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/13770796002.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e5cc192-1609-478d-acf7-72c590d415a8/96631082431.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/arial_nova_bold_font.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/justification_by_faith_in_romans.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/divine_divinity_original_sin_2_crafting_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/wuvene.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/construction_company_profile_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/letter_template_for_powerpoint.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_off0000c0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0DE 5300 bytes
SHA-256: b77b7f2d3489c1ae9cc289b8cf7272407687df5018fb32a10f090c68d44471dd
font_01_sfnt_off0000d2d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D7 9908 bytes
SHA-256: 619e1c727d5561ef1752d0db0c8b3fb6eda9e638481a54b17c94a83968ab5f43

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