Malicious PDF — malware analysis report

Static analysis result for SHA-256 af47177dfdd2e982…

MALICIOUS

PDF

79.5 KB Created: 2021-04-26 18:59:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 2655663b85470136b4c1a565b222337a SHA-1: d1793a7e0f0c8d19b911d1561ae84e95880f2683 SHA-256: af47177dfdd2e9821b1753eece373a9aeadc3709eac224241774a5a1c1b8eb46
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to disposable hosting, suggesting a link farm designed for SEO manipulation or phishing. The primary URL, 'https://xezojetit.ru/strik?utm_term=what+is+the+study+of+matter+and+energy', is likely part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://xezojetit.ru/strik?utm_term=what+is+the+study+of+matter+and+energy PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418987/normal_606a9a945d5b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409107/normal_6016cd32088ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366364/normal_6050f92811eb3.pdfIn PDF document text
    • https://mefomenixa.weebly.com/uploads/1/3/4/2/134235772/buwepikixeneforozi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501975/normal_6030d1df60f06.pdfIn PDF document text
    • https://xidaxawefitorat.weebly.com/uploads/1/3/5/9/135958331/peliveru.pdfIn PDF document text
    • https://nuresoxak.weebly.com/uploads/1/3/1/3/131380504/vinug_juzelomuwid_pamadukezunepab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375705/normal_5fcf1efdab566.pdfIn PDF document text
    • https://wolafufep.weebly.com/uploads/1/3/5/3/135305459/1457349.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427080/normal_6044cb44b6177.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410976/normal_5fc91d99d1635.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449014/normal_603be0d8ebe59.pdfIn PDF document text
    • https://zomonuluxerow.weebly.com/uploads/1/3/4/8/134867862/9310040.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/2557ed9a-dcbc-4e89-9ade-80beb8e0c7f7/power_wheels_jeep_hurricane_extreme_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6431a79a-15db-49cf-b09a-6f38250ae300/sample_of_chemistry_lab_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b30768dc-be7b-4e1e-bebb-24528b0e174e/jewenozakevateforowob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9675d6e5-27ca-456d-9409-b07ee703eef7/86040220627.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c7b1258-f98e-44ef-8d85-7f0f9c85dc8f/kubota_bx2230_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89bfd86a-0298-41a5-a00d-63868d2758b8/warrior_cats_film_trailer_deutsch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf60648b-0366-4387-a4ba-705c197d4efc/10029162570.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_off0000f954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF954 5404 bytes
SHA-256: 1360bd1ba1851d908f44f5bb0d152958704b30458a1ce7525d8578e4e7b5ccbc
font_01_sfnt_off00010b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9D 10372 bytes
SHA-256: fc96d40e5eea3676bcdc7397c7b0c35e8201783d085dbeb6d68963eb0b619179