Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a5d4073f979b27b…

MALICIOUS

PDF

75.8 KB Created: 2021-04-01 16:30:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 592d3cff6767ed6dadc256bbad92c7a3 SHA-1: 643633b06e65360ddd8a5f273a93a4051bce5efd SHA-256: 8a5d4073f979b27bbc7d11bb70f64a2957ad38f79aa1ead929a0537d134ee812
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The file is a PDF identified as a credential phishing lure impersonating Walmart. It contains an embedded URI pointing to a URL that likely leads to a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing attack.

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://gaxuzuwe.weebly.com/uploads/1/3/1/8/131871814/0b74a503f41e.pdf.
  • 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://bologen.ru/strik?utm_term=how+to+put+money+on+pnc+prepaid+card PDF link annotation
    • https://gaxuzuwe.weebly.com/uploads/1/3/1/8/131871814/0b74a503f41e.pdfIn PDF document text
    • https://rebumazezip.weebly.com/uploads/1/3/4/8/134860465/9822773.pdfIn PDF document text
    • https://zejibepubik.weebly.com/uploads/1/3/1/0/131070590/kufelivudusegolomo.pdfIn PDF document text
    • http://masumog.22web.org/what_is_news_flow_in_journalism.pdfIn PDF document text
    • https://cdn.sqhk.co/tuledapozato/jbekffz/slingo_games_free_online.pdfIn PDF document text
    • http://delojenopow.66ghz.com/critical_path_method_construction_template.pdfIn PDF document text
    • https://kikipaniwuno.weebly.com/uploads/1/3/4/7/134714830/1e8ae.pdfIn PDF document text
    • https://cdn.sqhk.co/bodosuruwalu/fGghbha/45893702042.pdfIn PDF document text
    • https://pipabujul.weebly.com/uploads/1/3/2/6/132680817/ec3e2d7546.pdfIn PDF document text
    • https://libepuve.weebly.com/uploads/1/3/1/4/131407284/2688071.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xovizoj.rf.gd/agorafobia_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/embedding_quotes_worksheet_middle_school.pdfIn PDF document text
    • http://botasalipigu.epizy.com/nec_advanced_analytics_platform_solution_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0172a4d-cd76-44c3-b60f-2c1358fbd812/76224986347.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43c755ae-a14b-4030-bf6e-5833dff7ad40/vishnu_sahasranamavali_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/car_accident_reports_215_freeway.pdfIn PDF document text
    • http://darewuxopasog.rf.gd/zijavidumegolidon.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/5124119058.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/division_2_starter_guide_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/apple_fake_email_reporting.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_off0000ec62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC62 5164 bytes
SHA-256: 4d45e06d737f2dc47aa36e2135d36fdede7cc48459e9b96c893126658aa762e0
font_01_sfnt_off0000fdf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF5 10564 bytes
SHA-256: 5bf30189645f940cf7e1624154b0156b97f639208ef821eb804f15956b74c59b

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