Malicious PDF — malware analysis report

Static analysis result for SHA-256 d58639b6e85ebbb5…

MALICIOUS

PDF

65.3 KB Created: 2021-02-21 16:37:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 10fde985f2f0d5d666523b4a034ee578 SHA-1: c1674beb777cac928b81a4122ac90ac34ac85938 SHA-256: d58639b6e85ebbb59276d4853d3bcd9318ede721850a2e50a8546874c061105d
246 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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://togezajotutev.weebly.com/uploads/1/3/0/8/130874352/bexaxozoxididuk.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://maypoin.ru/wix?keyword=sample+business+law+exam+questions+and+answers PDF link annotation
    • https://togezajotutev.weebly.com/uploads/1/3/0/8/130874352/bexaxozoxididuk.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/cgeidrd/81952796647.pdfIn PDF document text
    • https://cdn.sqhk.co/vipatajase/oijgchb/slack_download_ubuntu.pdfIn PDF document text
    • http://naturaleone.space/sociological_perspective_of_religionfl7sv.pdfIn PDF document text
    • https://zusavakaki.weebly.com/uploads/1/3/0/8/130815140/zevomikafonuv.pdfIn PDF document text
    • https://fumevido.weebly.com/uploads/1/3/0/8/130874276/10b4c.pdfIn PDF document text
    • http://deemonatrafik.xyz/mavulakexawajicbwyu.pdfIn PDF document text
    • https://nojokuvevufig.weebly.com/uploads/1/3/4/1/134109253/7793782.pdfIn PDF document text
    • https://xubivolimoba.weebly.com/uploads/1/3/0/7/130740090/tolefade-getidere-mibow-gililujonatuvat.pdfIn PDF document text
    • http://storezone.info/widaxititezemazoytp.pdfIn PDF document text
    • http://kino-vezde.ru/90718008992840c1.pdfIn PDF document text
    • http://save50it.pro/filo_pastry_sheets_recipesohfuo.pdfIn PDF document text
    • http://vovality.club/tamil_nadu_election_result_2020am3hp.pdfIn PDF document text
    • https://xiluxobafuju.weebly.com/uploads/1/3/5/3/135323992/kugabubif.pdfIn PDF document text
    • http://fepekasizu.iblogger.org/asus_vivobook_x510ua_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kulinikono.epizy.com/what_is_newtons_3rd_laws_of_motion.pdfIn PDF document text
    • http://jetetekeputesi.epizy.com/c_wpf_expander_template.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_off0000c149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC149 5632 bytes
SHA-256: 0707cfa31c202106eada5c291e4d88ada1c7467cf6cc0f952fd9a124fbcf8840
font_01_sfnt_off0000d466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD466 10524 bytes
SHA-256: 33dfb1f213bdc575b186fe1a5a6e34b2d4863bd4c29b3f41085030435c9d6ef6