Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e352c1b0797dc4d…

MALICIOUS

PDF

72.8 KB Created: 2020-12-22 03:01:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cd8c6936d9d9322f9f0e9f18fb070a35 SHA-1: d28419f868140e8393e3c4997f17544ee04a412c SHA-256: 4e352c1b0797dc4d67f600dba68d857771fafb88796cc8320ccf7d32faf7217b
156 Risk Score

Malware Insights

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

The PDF contains a mass of external links, identified as a PDF link farm, with one prominent URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or SEO manipulation. While no scripts were extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

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://traffnew.ru/aws?utm_term=color+street+scavenger+hunt+answers PDF link annotation
    • https://sinonulu.weebly.com/uploads/1/3/4/6/134654736/53ffa1a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421051/normal_5f9be5a9c0f4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408188/normal_5fd7c1c6cc0db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417206/normal_5fc6a08179f1a.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/8ddb7fd0-16df-4f9b-b3ae-09a4fd8f0b4f/wejebebox.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/brookstone_compact_wine_opener_video.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dd745bcb0228a2824d01/t/5fc248bb3f75b166431ed36b/1606568128641/geometry_chapter_3_resource_book_lesson_3.3_practice_a_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/m_l_a_ki_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/bloodstained_ritual_of_the_night_boss_guides.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b38c2f84-2823-46e3-a08b-178093889004/59180107151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87a99d4a-77ef-4ee9-820d-a306b9b5eaa8/52062109662.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/folk_devils_and_moral_panics_stanley_cohen.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_off0000df7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7D 5120 bytes
SHA-256: 1dc17a46e320304d013ac6de4f4b9c61ca7dd75363ebd9e39b777b9f2605ff03
font_01_sfnt_off0000f0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F5 11184 bytes
SHA-256: a816e2d73fba79ede7b1b75097a7af749b071df7ec5765a4e0e42d9ecc03f62a

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