Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d158671d3b39ef…

MALICIOUS

PDF

71.8 KB Created: 2021-02-25 13:08:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 70e8d4bd432983fbf5dd6cacbb7b1754 SHA-1: 8ee18b0b23d6e2cd34b212ced5920e4c86c5ece8 SHA-256: d7d158671d3b39ef6da298da604fb9bf101aa8bcbeb537c565e7aa2a3c732320
186 Risk Score

Malware Insights

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

The sample is identified as a credential phishing lure impersonating 'Target'. It contains multiple external URIs, including a link to a redirector hosted on 'weebly.com', which likely leads to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to credential harvesting.

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
  • 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://sibevuguz.weebly.com/uploads/1/3/4/8/134859718/pujawupibapakew-lalaxurenotasav-wulapesu-sonuxef.pdf.
  • 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://jacksth.ru/wix?keyword=kennedy+accounts+motley+fool PDF link annotation
    • http://porn77.design/debagewadasumogn7yh4.pdfIn PDF document text
    • http://davupopebuwiser.sportsontheweb.net/peselopufobituvofugeke.pdfIn PDF document text
    • http://vipadminler.org/organic_chemistry_9th_edition_mcmurry9d7mi.pdfIn PDF document text
    • https://sibevuguz.weebly.com/uploads/1/3/4/8/134859718/pujawupibapakew-lalaxurenotasav-wulapesu-sonuxef.pdfIn PDF document text
    • https://kiwosetivugo.weebly.com/uploads/1/3/0/8/130874254/rikuluwinagogupuzaja.pdfIn PDF document text
    • http://kunujunekedi.mygamesonline.org/15821288289.pdfIn PDF document text
    • http://belldiscount.ru/us_ballast_water_management_reporto853a.pdfIn PDF document text
    • https://rejomopoxe.weebly.com/uploads/1/3/1/3/131383333/rikarenigemurijovev.pdfIn PDF document text
    • http://netewe5.xyz/xibuxisepuledwzy7.pdfIn PDF document text
    • https://dodezugufiz.weebly.com/uploads/1/3/5/3/135331092/f6cf16.pdfIn PDF document text
    • https://vaxofawaz.weebly.com/uploads/1/3/2/6/132682661/pexekamulu.pdfIn PDF document text
    • https://noduxulab.weebly.com/uploads/1/3/4/9/134901810/gubotefarivof.pdfIn PDF document text
    • http://fagumawegoleleb.mypressonline.com/42903272034.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/koduvedoramavituzimuz.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/nabifovu/falcon_7x_spec_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/school_counselor_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/capital_employed_vs_balance_sheet.pdfIn PDF document text
    • http://jokosen.atwebpages.com/axial_ax90054_yeti_jr._rock_racer.pdfIn PDF document text
    • http://zotubune.myartsonline.com/73025756015.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_off0000dc0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0D 5144 bytes
SHA-256: 466493c35e9e02ab00a81df6c9efd1a5060e86840ec6744b8f9ad4a45cc8c974
font_01_sfnt_off0000ed91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED91 10656 bytes
SHA-256: 72779fb1e48924ec962946e3ece54b4f5b11d37c895794d2b5dd06872ce48dd2

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