Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad2dea278ec15b8…

MALICIOUS

PDF

65.6 KB Created: 2021-05-09 05:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1886902c90a402f8a92e6e55e748603c SHA-1: e7f8fd18578bce20fec4db56fcc90f4d9c51b896 SHA-256: fad2dea278ec15b81f8b84051536aa1f852747dc0d495fe9692861802ad7d706
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://baarspo.ru/strik?utm_term=twilight+saga+2008+full+movie+online+free PDF link annotation
    • https://cdn.sqhk.co/vefoxewijuja/Cybjghd/comprehensive_report_card.pdfIn PDF document text
    • http://kunepuvobimamin.medianewsonline.com/asciidoctor_maven_plugin_images.pdfIn PDF document text
    • https://cdn.sqhk.co/vugasoveg/li4QD5F/gasakunudixu.pdfIn PDF document text
    • https://cdn.sqhk.co/rirelolut/fhfKWgf/guidelines_for_ischemic_stroke_2018.pdfIn PDF document text
    • http://texifudosino.mygamesonline.org/celebrity_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/xedogigiloli/icwghsU/4682337355.pdfIn PDF document text
    • https://cdn.sqhk.co/ledirevobep/U9qFsie/fajol.pdfIn PDF document text
    • http://frukt.fun/supermarket_flowers_lyrics_videoozmn4.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/hernandes_dias_lopes_livro_de_joao.pdfIn PDF document text
    • http://eushopvmn.site/70104672557o6689.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/503d9e91-f29f-4cd1-8e71-210d63d456af/arbys_secret_menu_items_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb959b78-21ab-43f0-920a-daaf60706b40/lateral_thinking_meaning_and_examples.pdfIn PDF document text
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_e97ca4c8b961409ba8bca97cf2eb3bb1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fae2d41d-1371-4d74-aa7f-cbdbd13f78ef/breville_je98xl_juice_fountain_plus_850-watt_juice_extractor_costco.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_off0000c1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1B9 5748 bytes
SHA-256: 00e1ceab7ece3c665bfba13477ed5b9b54cb1156d192bc36f07e09202e086f02
font_01_sfnt_off0000d53b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53B 10660 bytes
SHA-256: d96c561e20af9c10830267c4d558084f6d8960c791ee1ba4faa668a3eabbfe30

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