Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a9201ef8322a9ac…

MALICIOUS

PDF

73.7 KB Created: 2021-02-04 22:18:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 100999ecd9e85289291b7879f3955000 SHA-1: 8168904bbf816e6c03cead7f127bbe3a39f20b12 SHA-256: 4a9201ef8322a9acb7a1bb5a7ddb3827288a87792dd24d560a2f0bb2afdcced5
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://druttle.ru/aws?utm_term=representative+elements+pdf PDF link annotation
    • https://pesukiziguz.weebly.com/uploads/1/3/4/1/134108741/ca9fc56cfd.pdfIn PDF document text
    • https://jefamozalubibul.weebly.com/uploads/1/3/1/4/131438275/f06dff981.pdfIn PDF document text
    • https://foguvebosep.weebly.com/uploads/1/3/5/3/135315209/4356304.pdfIn PDF document text
    • https://batebabegusuk.weebly.com/uploads/1/3/1/4/131437625/befovusufiw.pdfIn PDF document text
    • https://motutipe.weebly.com/uploads/1/3/4/6/134674000/7030236.pdfIn PDF document text
    • https://jafedojinow.weebly.com/uploads/1/3/0/9/130969492/liwozobonadeno.pdfIn PDF document text
    • https://jilarikogezinuv.weebly.com/uploads/1/3/0/9/130969280/89666f34f4.pdfIn PDF document text
    • http://ital-girl.space/percy_jackson_and_the_stolen_chariotbiq7v.pdfIn PDF document text
    • http://sosunimepewe.22web.org/android_auto_mirror_senza_root.pdfIn PDF document text
    • https://vobudofokivelux.weebly.com/uploads/1/3/4/5/134599261/fijimorifan.pdfIn PDF document text
    • https://ziwagunu.weebly.com/uploads/1/3/4/8/134883986/damobo.pdfIn PDF document text
    • https://binigikuvoloxog.weebly.com/uploads/1/3/5/3/135332024/94757548df0631.pdfIn PDF document text
    • https://nipetetoxijekuj.weebly.com/uploads/1/3/4/7/134718304/48a00a3f9be743.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mebexadesojixip.rf.gd/yahoo_messenger_2019.pdfIn PDF document text
    • http://rixijine.rf.gd/73212269824.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_off0000e577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE577 5252 bytes
SHA-256: c786ea723d2768b80a588b0a8a3cf6e24ee3f2831090c9bcf52be86d5ff4bf77
font_01_sfnt_off0000f74a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74A 10244 bytes
SHA-256: a6f2d9645dffc4025d67de0d9434db95fbbaeaa2184a7808d9818f077c44084b