Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cbebdfa437fdcdf…

MALICIOUS

PDF

67.5 KB Created: 2021-02-01 21:28:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: c1f8eb274f7181be68055d0468160a7b SHA-1: 08f6b7048647ab8a5093f0258309a9a893b06f42 SHA-256: 2cbebdfa437fdcdf38aa42a5941730a3117ea5959b29c3c28dc9e9fbebb7e416
186 Risk Score

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
  • 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.
  • 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://bologen.ru/aws?utm_term=acrobat+pro+vs+standard+pdf PDF link annotation
    • https://pusudojajepi.weebly.com/uploads/1/3/5/3/135322366/morekijaviri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489598/normal_60155dcb8e41a.pdfIn PDF document text
    • https://cdn.sqhk.co/woxezelej/Zhh1xc1/52226516132.pdfIn PDF document text
    • https://kufojinelimipi.weebly.com/uploads/1/3/0/7/130776518/5897d4966b.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/zhaifmR/75489983705.pdfIn PDF document text
    • https://zunukewonodej.weebly.com/uploads/1/3/1/4/131453615/kesezobisoraju.pdfIn PDF document text
    • https://cdn.sqhk.co/sadetujadufi/igKibVT/tokugeniretigiwuwo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477863/normal_5fe0d701d4bd4.pdfIn PDF document text
    • https://galofufe.weebly.com/uploads/1/3/1/3/131384583/4076474.pdfIn PDF document text
    • https://mufuwavujove.weebly.com/uploads/1/3/4/0/134042856/jibem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465274/normal_6011c25ec3cbd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460460/normal_6004e85b429b1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jefevuxivux.epizy.com/tojod.pdfIn PDF document text
    • http://nazopagoja.epizy.com/meters_above_sea_level_short_form.pdfIn PDF document text
    • http://gujimimokogofe.rf.gd/colorectal_cancer_screening_guidelines_singapore.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_off0000cba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA4 5304 bytes
SHA-256: a6c6939fa6654348350b1e068d580b1dbd8ab95f3fb5aab62f8fece27335162c
font_01_sfnt_off0000ddc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC1 10480 bytes
SHA-256: abc8bb79a1badcfdf2343afdfcbede23a70409bdad0c03faa51db9d8e4acd007