Malicious PDF — malware analysis report

Static analysis result for SHA-256 680f758ed90faac4…

MALICIOUS

PDF

70.8 KB Created: 2021-01-31 11:52:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a0362ebd3e6fffa69f8c38ba55d70415 SHA-1: 01df650c5116e5d9c622ea562f5eb9b9c569a05e SHA-256: 680f758ed90faac4f4913feabc0834df328db851246d61e42d47fc06afcd98d8
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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/aws?utm_term=uonbi+admission+letter PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413473/normal_60070a67b68ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481821/normal_5fe34db18ab9f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378831/normal_5fef11fca3c51.pdfIn PDF document text
    • http://bestgirl69.com/sadigogeferiratimufurijuuf4kx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464082/normal_5fd61cd60e9c6.pdfIn PDF document text
    • https://marejipafikelor.weebly.com/uploads/1/3/1/4/131437604/490761.pdfIn PDF document text
    • https://nenilinuda.weebly.com/uploads/1/3/1/3/131383514/xolipe-dotuxafo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386365/normal_5fd3bd32b3bf3.pdfIn PDF document text
    • http://thehensleys.org/duwepetitabajufbef1p.pdfIn PDF document text
    • http://gayerkan.com/fexovalajokepubipenokevhhoax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453333/normal_600c774b00e10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nitesegu.epizy.com/rocket_league_cross_platform_steam_xbox.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/butterball_turkey_fryer_cooking_guide.pdfIn PDF document text
    • http://lixaxezubor.rf.gd/featherstone_wood_primary_school_stevenage_ofsted_report.pdfIn PDF document text
    • http://pikarofuwab.epizy.com/nosofobekiga.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_off0000da19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA19 5100 bytes
SHA-256: 4eeaaed30c70148b730cfd4d68459edbaf7e06451c7f4197dcca1024d1537850
font_01_sfnt_off0000eb58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB58 10328 bytes
SHA-256: 8077f38038bae5a3ce1fe8b3ae797dca93e1a7063e73f000c365a227e7172fe9