Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d4daf80ae47d48c…

MALICIOUS

PDF

66.6 KB Created: 2021-03-11 02:47:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 04e6be86e4d9d9b225b39f7c048d0021 SHA-1: 331f005b5b6f1d5b935181fd94732af36437561c SHA-256: 6d4daf80ae47d48c0d9a1c2a224cb4891cf061053871ed0784d3f2f41600e883
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the overall structure indicate an attempt to distribute or phish, aligning with T1566.001. No scripts were extracted, but the PDF's nature suggests it may exploit PDF vulnerabilities or rely on user interaction with embedded links.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://resalured.ru/wix?keyword=palermos+pizza+beloit+wisconsin PDF link annotation
    • https://cdn.sqhk.co/sejejajoxej/iOdwI93/lefasunamiro.pdfIn PDF document text
    • http://cleanup-sale.site/tv_ears_amazon_ukyvf16.pdfIn PDF document text
    • https://sixutaxujarupi.weebly.com/uploads/1/3/4/8/134882582/pirad.pdfIn PDF document text
    • https://subijiderekura.weebly.com/uploads/1/3/4/6/134616270/b7a34080.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485807/normal_5fcef15bd1698.pdfIn PDF document text
    • https://cdn.sqhk.co/sepovili/iLicAqD/epsxe_for_android_download_gratis.pdfIn PDF document text
    • http://carishr.com/53436264073grd1j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451949/normal_5fd709950cb04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491410/normal_5ff017f3b6db4.pdfIn PDF document text
    • https://cdn.sqhk.co/nilofixogezu/aQngijc/endless_surfers_subway_runners_3d_model.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/52858aab-4138-4461-a599-a7d8c0c0626f/sony_bravia_klv-32w622g_32_inch_led_hd-ready_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/625bbd28-f7ce-4fcb-bb92-744beacfcbc3/xezepapixer.pdfIn PDF document text
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_a6d4818e00464c30bb7e79b16c051b2c.pdf?index=trueIn PDF document text
    • https://146c8b6c-0b46-450b-8ed0-b45f1e2a4974.filesusr.com/ugd/b58d21_b2f1484d4b4945b0b49e49b34fc2183b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/79e109fa-3fbb-49c9-b353-450014e4cabf/how_many_magic_tree_house_books_are_there.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cf4dece-6471-461a-93d4-94f2781152e5/dominos_ranch_dressing_recipe.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_off0000c7c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C1 5364 bytes
SHA-256: 3ea5dc275edf1d9d2eb2a5c24f864ef8d9aae4bbc085dbd0564b3665ff61f1c5
font_01_sfnt_off0000d9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FD 10412 bytes
SHA-256: 917ec8a87fc764d5f5a42dfbcd34ddc95f957c6886a752d83aadc3a94f93d027

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