Malicious PDF — malware analysis report

Static analysis result for SHA-256 5750e7ebaedb5e88…

MALICIOUS

PDF

77.2 KB Created: 2021-06-12 14:10:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2d743381b1b9e86a38653b47084a9c21 SHA-1: ef1ce8cbfefc83301270525c6567b56753574796 SHA-256: 5750e7ebaedb5e881517830e7c96a27cfea2d9761f6dfcc03589703c78f17c9d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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 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://crewmak.ru/pbw?utm_term=how+to+appraise+a+pokemon+in+pokemon+go PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421970/normal_5fd1c70df054c.pdfIn PDF document text
    • https://kojozenozifi.weebly.com/uploads/1/3/5/3/135315032/telajojobuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486363/normal_6066248107916.pdfIn PDF document text
    • https://jikevumuvovidu.weebly.com/uploads/1/3/4/3/134324483/vubakibamare.pdfIn PDF document text
    • https://wajutuba.weebly.com/uploads/1/3/4/6/134656264/d199716e90b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502336/normal_5fee4e7154834.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373517/normal_5fed5edbce38d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491925/normal_6058e77848de8.pdfIn PDF document text
    • https://xogotosab.weebly.com/uploads/1/3/4/3/134327909/lagipozaligezi.pdfIn PDF document text
    • https://giwaxevo.weebly.com/uploads/1/3/4/6/134644090/jogadozi.pdfIn PDF document text
    • https://nanagimub.weebly.com/uploads/1/3/4/6/134632235/4721636.pdfIn PDF document text
    • https://disuterobusubu.weebly.com/uploads/1/3/5/3/135305861/buluxabuk.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/c485189d-3540-4406-912c-cbdb56e6a9af/best_ranger_prestige_classes_3.5.pdfIn PDF document text
    • http://wotasaful.pbworks.com/w/file/fetch/144567489/o_que_significa_movimento_uniformemente_variado.pdfIn PDF document text
    • http://foziwedugumu.pbworks.com/f/how_to_bind_spektrum_dxe.pdfIn PDF document text
    • http://difusowafid.pbworks.com/f/10120193415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29279c94-ef8d-4179-8187-db4c3362cd0c/86505589647.pdfIn PDF document text
    • http://fosirodovo.pbworks.com/f/balance_chemical_equations_worksheet_1.pdfIn PDF document text
    • http://pefagisunel.pbworks.com/w/file/fetch/144753093/wuwoxuludalasel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8a4bb1d-34aa-4f33-9adb-3926e781d9a0/what_date_does_school_start_in_qld_2021.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_off0000ed4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4A 5224 bytes
SHA-256: 0a0719040d2867632e48643931cee095a575a2dada5f1a5966076e61dea3e5b7
font_01_sfnt_off0000ff10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF10 11904 bytes
SHA-256: cccd5ba40e0266d76c4878c2150265c6d755b580a0ad3377420029d534a74039

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