Malicious PDF — malware analysis report

Static analysis result for SHA-256 d560d40d022a153c…

MALICIOUS

PDF

68.4 KB Created: 2021-05-25 07:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6ce89cbedf8d817123f8a7c6667a9907 SHA-1: 177332ad2eab946fc6ee21b5a061e562823ea2a6 SHA-256: d560d40d022a153c3bac33a029ace844d05d7a33a4347005cdbf2130136bc90a
186 Risk Score

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 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://druttle.ru/strik?utm_term=de+la+codependencia+a+la+libertad+pdf+descargar PDF link annotation
    • https://loraxero.weebly.com/uploads/1/3/4/3/134332649/829807.pdfIn PDF document text
    • https://nikuwexipamojag.weebly.com/uploads/1/3/0/8/130813731/pevofazifozadow_sidujawusufe.pdfIn PDF document text
    • https://megogira.weebly.com/uploads/1/3/4/5/134590171/rusejobivudanoji.pdfIn PDF document text
    • https://wevetajapejo.weebly.com/uploads/1/3/4/6/134636724/d76260e865ebf.pdfIn PDF document text
    • https://subogepaweb.weebly.com/uploads/1/3/2/3/132302814/roterip_gijexopizixorug_titililexesew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379606/normal_606c026020240.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428331/normal_6060e23aeec1b.pdfIn PDF document text
    • https://sipebiwamedewor.weebly.com/uploads/1/3/4/7/134707389/1746073.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/mekofolezogokid.pdfIn PDF document text
    • https://vavinaxedekofew.weebly.com/uploads/1/3/0/9/130969509/5207805.pdfIn PDF document text
    • https://ruwuragawani.weebly.com/uploads/1/3/4/3/134383911/tekotumikaf.pdfIn PDF document text
    • https://ginadilu.weebly.com/uploads/1/3/4/7/134768391/9486328.pdfIn PDF document text
    • https://gagakulusete.weebly.com/uploads/1/3/5/3/135326625/a19f7f4c.pdfIn PDF document text
    • https://vizijupazikek.weebly.com/uploads/1/3/2/8/132814338/4351608.pdfIn PDF document text
    • https://tonuwuro.weebly.com/uploads/1/3/0/7/130739505/331198.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/sedimeraxufi/33128679426.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/denver_weather_report_today.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/wusik.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/kidde_smoke_and_carbon_monoxide_alarm_kn-cosm-1b_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/escritura_cuneiforme_significado_de_la_palabra.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_off0000ca49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA49 5464 bytes
SHA-256: 2de3d3ae60a031084c690b49606e0cd2ae8d363a795b48143dc4771f7e80494f
font_01_sfnt_off0000dce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE7 11684 bytes
SHA-256: 0b2027167d33e765667b4de72eeb1f2182714db2060dcb56196a1ef8d59c46ef