Malicious PDF — malware analysis report

Static analysis result for SHA-256 7112ea59d4c8e42f…

MALICIOUS

PDF

64.0 KB Created: 2021-03-22 20:28:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: bf4b022d6e1405c0912af3ff22aba18d SHA-1: 120137aad2b6024e04a6efd41289ce89c4ce7b08 SHA-256: 7112ea59d4c8e42f328af41790247fbcf74f59404f9ae3c94afaefe25d8708e9
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.9722

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.
  • 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
  • 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://mezovuduw.ru/123?utm_term=malia+lads+holiday+guide PDF link annotation
    • https://ludasajuwo.weebly.com/uploads/1/3/4/0/134096591/88636.pdfIn PDF document text
    • https://zetolame.weebly.com/uploads/1/3/0/7/130775520/357135bb8.pdfIn PDF document text
    • https://xipinirobidojuv.weebly.com/uploads/1/3/4/0/134017625/popubewan-namubunawejibu-gobomozodimoge-vevezidotimul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500001/normal_600990b7e9504.pdfIn PDF document text
    • https://zunotexiru.weebly.com/uploads/1/3/4/8/134890048/2727694.pdfIn PDF document text
    • https://xubajibagi.weebly.com/uploads/1/3/1/3/131378916/2958067.pdfIn PDF document text
    • https://lobogisotu.weebly.com/uploads/1/3/4/8/134870795/6298044.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408584/normal_601a11f4cb565.pdfIn PDF document text
    • https://magagitu.weebly.com/uploads/1/3/5/9/135959352/mevadow_dupajemasu_zaziwixi_derud.pdfIn PDF document text
    • https://fomunova.weebly.com/uploads/1/3/4/6/134684458/diwasa-vesanefaroda.pdfIn PDF document text
    • https://metekubop.weebly.com/uploads/1/3/1/4/131438843/gepaleruwenuvogimum.pdfIn PDF document text
    • https://regafuraseni.weebly.com/uploads/1/3/4/6/134663643/tapov.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/posufij/2930349779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b5ba467-6898-4d59-9a14-580ad198dde5/50269962370.pdfIn PDF document text
    • https://e26976e3-f089-44cc-a2a6-54bcc6cae308.filesusr.com/ugd/0df15e_8b51dc3d82f344fbbd665bbad1ec1683.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3af0a179-b2bf-4d1a-922e-97bce8676a2f/jasitifev.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/gixobukavufisun.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/14_fwy_south_traffic_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7df8d8cb-8264-4fa5-aacf-eba1d1e55e1b/diary_of_a_wimpy_kid_rodrick_rules_jeff_kinney_audiobook.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/7689780663.pdfIn PDF document text
    • https://3ae4d138-4ba3-4962-98fb-1b98b40a6a82.filesusr.com/ugd/38062a_4ee8e616997b475fa6d1404d75441cf1.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEF 5096 bytes
SHA-256: 1b2f6db1d1a55a84bbe3b670bd1d491d470b451ef2e403f3975ab96e68129fb0

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