Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffb2a309ebfbfdc6…

MALICIOUS

PDF

73.9 KB Created: 2021-05-06 19:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7b0009e252f30bf62181765eab20520a SHA-1: 32da5b65347268c1bd887df233aabc3939409d2e SHA-256: ffb2a309ebfbfdc6794dd609dffbc4e3c1ae78c8df6ee5dd5b2a3aa1429770a8
166 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. The document contains numerous embedded URLs, one of which, 'https://fokemale.ru/strik?utm_term=big+little+lies+season+2+review+av+club', appears to be the primary lure. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be part of a multi-stage attack involving a password-protected archive, intended to bypass gateway scanning.

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://fokemale.ru/strik?utm_term=big+little+lies+season+2+review+av+club PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4403937/normal_5fce64b53436c.pdfIn PDF document text
    • http://magozeveta.iblogger.org/24759153361.pdfIn PDF document text
    • http://electorat.org/convert_file_to_ms_word_formatcejf5.pdfIn PDF document text
    • http://unonatur.space/asterix_legionario_portuguesztfo0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469852/normal_6059050045f2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466172/normal_601527d68d59f.pdfIn PDF document text
    • http://rawenspant.online/razer_blackwidow_keyboard_lights_not_workinguyywh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405903/normal_5ff854e06a701.pdfIn PDF document text
    • http://emirofficialzm.com/bezanamenomoruezxc3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mamotipovefo.rf.gd/ludoj.pdfIn PDF document text
    • https://76a725e8-946c-4ae9-9249-cda469d35108.filesusr.com/ugd/83c8cc_471b924b0c244ea4afe8a02e81cc63c4.pdf?index=trueIn PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_035ca295f9ac4051a49fbf2ec3202da1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gosete/microsoft_excel_online_training_syllabus.pdfIn PDF document text
    • http://setuvufijub.epizy.com/ceylon_tea_brokers_annual_report_2016.pdfIn PDF document text
    • https://178c1879-e916-404b-9861-a2431bd0f83a.filesusr.com/ugd/1aace6_0d9c7ef0d8d0470c91a920db66731c70.pdf?index=trueIn PDF document text
    • http://javasuk.epizy.com/nasogastric_aspiration.pdfIn PDF document text
    • http://lusuzajemofim.rf.gd/22137248922.pdfIn PDF document text
    • https://d6504552-49b0-4b7d-b1ff-94f9e1082b83.filesusr.com/ugd/1f0558_8acd8cd176214c048bfe7c13966fd1bd.pdf?index=trueIn PDF document text
    • http://nutujetis.rf.gd/to_all_the_boys_ive_loved_before_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/dark_phoenix_imdb.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_off0000e4c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C6 5440 bytes
SHA-256: 937f5f56b28516d8605ca01624d76c7557fbf9aa5b30ff2dfa6592c3d56bdaa3
font_01_sfnt_off0000f776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF776 10396 bytes
SHA-256: e76002f0ff7d47740d7fe95f92c3c796a44b56df439866c8d1a0c3546b71d8af

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