Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c33ed2013ede289…

MALICIOUS

PDF

69.6 KB Created: 2020-11-26 07:48:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6485e6b74a5680189ba6e734fbc1ceba SHA-1: baf2d625eddbc7cda5314030fee64f552b28327c SHA-256: 3c33ed2013ede2895947b745f97f9403e93ee3184754177365be02027700810c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. The primary URL points to 'trafffe.ru', suggesting a malicious intent to redirect users. While no scripts were directly extracted, the PDF structure and the presence of external links indicate a likely attempt to deliver malicious content or phishing pages to the user.

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://trafffe.ru/123?utm_term=nba+players+%252340 PDF link annotation
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/gajebatote.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384323/normal_5f9d1a27c7b50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444864/normal_5fa366e31a64e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385612/normal_5fa68d55310fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394061/normal_5f9701904385f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375361/normal_5faa0db092c5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382406/normal_5fab38bad3927.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416923/normal_5f950195dd19e.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/17140759-c2be-432a-a151-cc868d37541e/apk_smule_sing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcfecf7d-bd59-45e0-a67a-2625472a752e/61437658985.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebdf789f-019a-4a9f-ae19-1f9f73ce12e2/68512395193.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/114960db-66d5-4cd4-8af6-77f130966da2/soil_worksheet_third_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0706820a-d879-4ee4-aec4-987b27fd9fd5/72374381658.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b5146c3-e609-421a-aa33-116e94c59cc4/65970798975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/063a3a0d-3f56-4348-9b3e-41cab5cdb01f/zonegadenon.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_off0000d2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F6 5024 bytes
SHA-256: 96c64b2eeae28f382af1c38ad74dd54810254de4c124a4d3ced697e4c896e0f7
font_01_sfnt_off0000e421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE421 11224 bytes
SHA-256: 002124ebedf8e1e25168175560df7d0e0fb2db7ad2196f71fb15159192af2667

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