Malicious PDF — malware analysis report

Static analysis result for SHA-256 e70b4492a132e179…

MALICIOUS

PDF

94.2 KB Created: 2020-12-19 09:44:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 1a0307126b0b61d7db820f3433201b14 SHA-1: bcf5ea8424d7c93ecf138600b486d29d487e315b SHA-256: e70b4492a132e179360f0d723ca48a34cdd989f4dd80f6d0872a3cdaa25fd2f0
156 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 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://traffine.ru/strik?utm_term=radiohead+paranoid+android+lyrics PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383804/normal_5f96ea2a7da3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5f8b117f06820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417118/normal_5fa7be7367762.pdfIn PDF document text
    • https://jesokalatozu.weebly.com/uploads/1/3/4/5/134591365/1738798.pdfIn PDF document text
    • https://zisokilusativ.weebly.com/uploads/1/3/2/3/132303079/944522.pdfIn PDF document text
    • https://fineruliji.weebly.com/uploads/1/3/4/3/134313455/vuger_rojezopiwusux_negozizipivixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f870473c9663.pdfIn PDF document text
    • https://xaziribubeka.weebly.com/uploads/1/3/4/3/134397614/vusorekidajuke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc2b9efbdb33045eece00d9/t/5fcd441bcded405bb8e602b5/1607287836257/gator_strike_plate_home_depot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a945759-ff40-48c3-8aca-a8136a20eb0b/malcolm_x_achievements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbd345a5-0af0-454e-afed-a468fb99945c/diferencia_entre_animales_domesticos_y_silvestres.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87b75f1f-7c8e-4fbf-afe5-fde189ad2895/bevusigox.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc7d42ec98190d8a5337c0/t/5fdd003a28857e262b1e93ac/1608319036129/onboarding_checklist_template_excel_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b10e516-f1e8-4dd1-ab80-dffcc80bd8e6/81647394973.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_off0001318d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1318D 5268 bytes
SHA-256: 5c66bd983aca9861bda09d300ba7cf658f6c63bbddaf0e1caf058597ca05c994
font_01_sfnt_off0001437d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1437D 12348 bytes
SHA-256: b7d6ad7218e27b27fd6d3625cb01328709c401e0ef8be1e6fe2421b815a8b7b6

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