Malicious PDF — malware analysis report

Static analysis result for SHA-256 631712fb76a7f6e2…

MALICIOUS

PDF

72.7 KB Created: 2021-02-24 19:17:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 392de58d059941d8cef69fc01029a024 SHA-1: c00ab230757e62ba8b49a10b1809e2d188c59f55 SHA-256: 631712fb76a7f6e21f3572216fff4f5c04e7bfc44222c2e44512a533b1c64886
226 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
  • 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://vefonero.weebly.com/uploads/1/3/1/0/131070196/90a609f702ee955.pdf.
  • 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://jacksth.ru/123?utm_term=how+do+i+reset+my+verizon+jetpack+password PDF link annotation
    • http://persequen.com/pezenulemirekupufu5c1en.pdfIn PDF document text
    • https://vefonero.weebly.com/uploads/1/3/1/0/131070196/90a609f702ee955.pdfIn PDF document text
    • http://tryse.xyz/how_to_make_a_large_crochet_circle_into_a_squareoflms.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487906/normal_602262141bb15.pdfIn PDF document text
    • https://bojuwidus.weebly.com/uploads/1/3/4/6/134698781/wamolaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476148/normal_5fe2d6a18b3f3.pdfIn PDF document text
    • https://vumuzasal.weebly.com/uploads/1/3/4/5/134586685/gofuwivadur-mawutakofezid.pdfIn PDF document text
    • http://armada.technology/biography_of_narendra_modi_bookx3gaz.pdfIn PDF document text
    • http://ig-objectionform.com/23503071988ellye.pdfIn PDF document text
    • http://electorat.org/lake_oswego_boy_scouts_christmas_trees_2020v2oi8.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/bizixeserodarul.pdfIn PDF document text
    • http://lidzadva.xyz/dracula_oxford_bookworms_downloaduu8rh.pdfIn PDF document text
    • http://fastgetme.online/additional_mathematics_form_5_notesalwo1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469359/normal_600f630a8333d.pdfIn PDF document text
    • http://pelistens.xyz/ark_survival_evolved_mod_apk_ios1c6li.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/gurowozenupifi/password_bangla_full_movie_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/fagunefarego.pdfIn PDF document text
    • http://zogujiduguku.epizy.com/xabowamujaniledizera.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_off0000dddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDC 5592 bytes
SHA-256: 5c8ce17f9ea5fa31134198e9480b420de96542f1bbdb59778a194e92ea594f1e
font_01_sfnt_off0000f0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F0 10812 bytes
SHA-256: 25079e987212227f66ce0ae8a07083fbf7686f911cbb93d64ed7a251ef6d045c