Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca67baac3a73ed75…

MALICIOUS

PDF

71.8 KB Created: 2021-02-24 19:25:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 2b50c341a410695c049533ff59feb8be SHA-1: 611fc37d217672e58734a95a0eaf65d8b41be48b SHA-256: ca67baac3a73ed7545d85a3db8530da6f64468b4402a948b6147919d4767a7e4
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/award?keyword=discrete+mathematical+structures+4th+edition+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403143/normal_603182db84cd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471273/normal_5fea08ee9afed.pdfIn PDF document text
    • https://mujiborabasovu.weebly.com/uploads/1/3/4/5/134590634/709ee1e306e1.pdfIn PDF document text
    • https://pewoguliburutoj.weebly.com/uploads/1/3/4/2/134234653/f9af26192e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422147/normal_5fdc589d3672c.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/solilonisodozomijon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381978/normal_60132bf2eb962.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/warriners_english_grammar_and_composition_fourth_course.pdfIn PDF document text
    • https://kivuxobusev.weebly.com/uploads/1/3/1/8/131871605/vasoxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402944/normal_601d8cb77cb75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418556/normal_6011a14b9fce6.pdfIn PDF document text
    • https://buzomuzugagi.weebly.com/uploads/1/3/4/3/134313884/3548062.pdfIn PDF document text
    • https://buvosaxemapo.weebly.com/uploads/1/3/1/4/131437370/mokavufatovoxoxeli.pdfIn PDF document text
    • https://xefakiradu.weebly.com/uploads/1/3/1/8/131856624/rogufe-dimiboxefewo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462035/normal_5fe2715d76137.pdfIn PDF document text
    • https://nolujamikudaze.weebly.com/uploads/1/3/4/8/134868466/xilevuritufa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://namakanexir.atwebpages.com/petroleum_production_systems_2nd_edition.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD11 5480 bytes
SHA-256: 04f740e045cf2af505528d727a2b77939d894a077b5a8ca3382c0033c25a8718
font_01_sfnt_off0000ef96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF96 10016 bytes
SHA-256: 6481eb5abcfcf9e5592232a9874e86e77a2d7bf8b59d974bd3d5848b3efd0e92

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