Malicious PDF — malware analysis report

Static analysis result for SHA-256 4072d3242f053e38…

MALICIOUS

PDF

76.4 KB Created: 2021-04-15 13:23:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 93e7e1ae9a92fba904c13c0dfbb7dbda SHA-1: 5880bfb7f3741930981cf8be3a16cf863f706673 SHA-256: 4072d3242f053e38c7eb6328628b7e25ef4c6f984d57e5a4a396bc4b7a38550c
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 0.9997

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://crophysi.ru/strik?utm_term=can+i+do+chest+and+triceps+together PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496582/normal_5fe148aac53ee.pdfIn PDF document text
    • https://wisetigu.weebly.com/uploads/1/3/4/3/134357320/4289564.pdfIn PDF document text
    • https://wivewuti.weebly.com/uploads/1/3/4/6/134698804/5203874.pdfIn PDF document text
    • https://wikazire.weebly.com/uploads/1/3/0/9/130968935/8227360.pdfIn PDF document text
    • https://mafakovik.weebly.com/uploads/1/3/5/3/135347242/kufifajaja_pokajegefojub_fuguketo_xexurivinake.pdfIn PDF document text
    • https://mezowizutu.weebly.com/uploads/1/3/4/8/134898125/3529249.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420018/normal_603c349f64acb.pdfIn PDF document text
    • http://fenellalucynelle.info/xps_8300_specificationsrib3w.pdfIn PDF document text
    • https://cdn.sqhk.co/gisepavuv/bldgchf/62693323314.pdfIn PDF document text
    • https://cdn.sqhk.co/pexejaxer/BJ8hatz/74308919760.pdfIn PDF document text
    • http://sneakerspapa.store/2240440673jfj9z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527164/normal_5fca906a92d98.pdfIn PDF document text
    • https://wazeketarawowaw.weebly.com/uploads/1/3/4/5/134587567/wulididofalo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375702/normal_60483cd105e6c.pdfIn PDF document text
    • http://igcopyrightforhelps.com/luxalenadisvls0m.pdfIn PDF document text
    • http://fc-aromat.ru/free_couples_counseling_workbookpjcni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/13760267303.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/109_aitt_exam_hall_ticket.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/biledim.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/4710844661.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_off0000ecfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFE 5208 bytes
SHA-256: d61f7f61952a2d5c5f519f64dba1edd275fef3b0d5fc380b94a950270ddd74dc
font_01_sfnt_off0000fea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA8 10992 bytes
SHA-256: 38cfe6d43d2b209db6ffa99f939249d7bc18c08aa029a9e05bfedc5d5ede20e4

Open this report in the interactive analyzer, or submit your own file for analysis.