Malicious PDF — malware analysis report

Static analysis result for SHA-256 c62eaf011bd86d20…

MALICIOUS

PDF

67.1 KB Created: 2020-12-19 08:23:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 756efd894679af7aa4358cd7ed7616ac SHA-1: ef33a79932bad8f74dd2edbfa6d490ed572b2f50 SHA-256: c62eaf011bd86d2065ae26e7edd730b6057c9bdba35b8f20a6e75cbb257f913a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous external links, with one prominent URL leading to a suspicious domain, suggesting a phishing or link-farming attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or facilitate further compromise.

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://traffking.ru/123?utm_term=the+power+efficiency+guide+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369503/normal_5f92af69d1a3a.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/5477161.pdfIn PDF document text
    • https://putomusozozor.weebly.com/uploads/1/3/4/3/134321488/3893992.pdfIn PDF document text
    • https://bevevigulamop.weebly.com/uploads/1/3/4/7/134759368/f823a421371c440.pdfIn PDF document text
    • https://talipugetajizan.weebly.com/uploads/1/3/4/8/134862074/gopunowufafi_nuviwilu_difelagigaki.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/5fc0f3af1c8c741314320bf8/t/5fc2950461e25426e18bfad4/1606587653451/pasor.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc105f69955c744b53c3d2c/t/5fcd0871cded405bb8dc8bc1/1607272562460/classic_car_driving_experience_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f474cd79-c8c7-4282-b997-0816843feb68/cmo_para_encontrar_nubes_de_polvo_e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a403533b-8ceb-4d61-bf7f-519526dd4d6d/depotikijajagosuwomelik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4435236-5357-48c2-ba41-93a5cf5dd7c1/2814951538.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8219cd02-e337-4d96-9721-6c07afe28ea5/11724324383.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_off0000c9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9BC 5140 bytes
SHA-256: 0ed4a654bf7e8d4bc61cf7188ac0dd070f0ef8791863d73a780ef8db40118837
font_01_sfnt_off0000db4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4E 10876 bytes
SHA-256: 9f85d572396f27b5a0820211e6e0b81c9e4f914ad0a5a702885cc866169db35b

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