Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f079d23e73ecf2c…

MALICIOUS

PDF

70.6 KB Created: 2021-01-23 14:06:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 1ced5394de974e41edb446a242ae7b7d SHA-1: 48dab99d40dd0bb29500362bf828c3eac25f226e SHA-256: 8f079d23e73ecf2c9e4764afdb3523919eb484458087c49e282b69f20369ae10
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/123?utm_term=social+security+office+greensboro PDF link annotation
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/2414289.pdfIn PDF document text
    • https://tugadebijo.weebly.com/uploads/1/3/4/0/134042488/1f093af.pdfIn PDF document text
    • https://site-1246605.mozfiles.com/files/1246605/event_management_responsive_template_free.pdfIn PDF document text
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/4539754.pdfIn PDF document text
    • https://site-1251335.mozfiles.com/files/1251335/libelium_smart_water_technical_guide.pdfIn PDF document text
    • https://jotozorofelafik.weebly.com/uploads/1/3/1/4/131405965/jowibujudezadamu.pdfIn PDF document text
    • https://site-1179214.mozfiles.com/files/1179214/zirafaxagu.pdfIn PDF document text
    • https://site-1179563.mozfiles.com/files/1179563/24794572390.pdfIn PDF document text
    • https://zogoporev.weebly.com/uploads/1/3/1/3/131381602/zoxapidiwalisu.pdfIn PDF document text
    • https://site-1177018.mozfiles.com/files/1177018/9698729707.pdfIn PDF document text
    • https://zukaxopukij.weebly.com/uploads/1/3/1/1/131164552/3786008.pdfIn PDF document text
    • https://site-1176931.mozfiles.com/files/1176931/69654640945.pdfIn PDF document text
    • https://site-1171568.mozfiles.com/files/1171568/how_to_grow_castor_beans.pdfIn PDF document text
    • https://lolinukopo.weebly.com/uploads/1/3/4/3/134351434/zabube_zutavezakaf_magetasare_nigoduvaxub.pdfIn PDF document text
    • https://nikojaba.weebly.com/uploads/1/3/4/6/134683319/6754449.pdfIn PDF document text
    • https://jolibudowuw.weebly.com/uploads/1/3/4/5/134596284/c7513.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zikimopotefeva.epizy.com/zupesabibomasalijuviwataz.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/xonuvuxupujikolatok.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_off0000d736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD736 5392 bytes
SHA-256: 63f5c75a3aec91fa862eba5fa3e0744c207f1e5df2defd4c9bff58ebf8b0d2ed
font_01_sfnt_off0000e9aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AA 10556 bytes
SHA-256: bf2ed12d544dc8a3789cb32028657dac190e2c4cec8a26ff748c6e51158b3eed

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