Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1ef86d221e184a5…

MALICIOUS

PDF

73.9 KB Created: 2021-02-16 19:27:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: a58763d0008d3cdd17f33fe6cc43e781 SHA-1: a6f404e14fa2dd34949443a66b29f995770d4474 SHA-256: c1ef86d221e184a5ac4e2a0a3f5c4dfbfd76aafe3636becbb863729b13ba6439
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://leonvi.ru/strik?utm_term=why+is+my+refrigerator+not+cold+but+the+freezer+is PDF link annotation
    • https://luvodufugatese.weebly.com/uploads/1/3/4/8/134893210/8447487.pdfIn PDF document text
    • https://jokinurelebuvet.weebly.com/uploads/1/3/1/8/131856462/nuvomejirug.pdfIn PDF document text
    • https://guvikaki.weebly.com/uploads/1/3/4/5/134519546/ca394008cd941f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392659/normal_5fd64c0de1ce9.pdfIn PDF document text
    • https://lexojonogi.weebly.com/uploads/1/3/4/3/134315697/wugeluje.pdfIn PDF document text
    • https://wesotapaxo.weebly.com/uploads/1/3/4/4/134488604/zepaniv.pdfIn PDF document text
    • http://lesagotefawa.22web.org/acer_aspire_e5-_575_drivers.pdfIn PDF document text
    • https://minoximamus.weebly.com/uploads/1/3/1/4/131437876/wewebegenekit-rosusanimovizav-goterari-sarafatexezili.pdfIn PDF document text
    • https://xivexibajewubud.weebly.com/uploads/1/3/1/0/131069970/sonixudav.pdfIn PDF document text
    • https://zokevuwokonumez.weebly.com/uploads/1/3/4/6/134682223/jajovatiwunuduvuvip.pdfIn PDF document text
    • https://namosozevo.weebly.com/uploads/1/3/0/9/130969937/rikip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bopexetosezulav.rf.gd/cessna_337_super_skymaster_service_manual.pdfIn PDF document text
    • http://besinaxot.epizy.com/boxtops4education_online_submission_form.pdfIn PDF document text
    • http://luxudaj.rf.gd/659707678.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/90468507458.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_off0000e27e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27E 5740 bytes
SHA-256: 9e96204aae127f91f31420847416843e15291d377ddb856238a435fc939ea428
font_01_sfnt_off0000f5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FA 10624 bytes
SHA-256: f29826757b9251ad788d69d95e6da0ed25a945546d7dba4cbeb035942038c3bd