Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4285e2268bff8c5…

MALICIOUS

PDF

71.6 KB Created: 2021-02-24 15:19:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 481beb513948124110444fd5d7fcec7b SHA-1: 6ccd29a007d52c25fb55f2fed7e7b0b70abe6b22 SHA-256: d4285e2268bff8c557220f5f2253eded0b3a8e6c5dce25cad147e6bb3db84dbb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or redirection scheme. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' strongly suggest malicious intent, likely for phishing or malware distribution. The presence of external URIs and the ClamAV detection further support this assessment.

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/wix?keyword=straight+talk+no+chaser PDF link annotation
    • http://afracheat6.xyz/8003368533828qb7.pdfIn PDF document text
    • http://winoraama.website/what_is_the_purpose_of_the_woodcock_johnson_testgnkp8.pdfIn PDF document text
    • http://7gusevshop.website/the_book_of_massage80jv2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422148/normal_5fe27700c38b5.pdfIn PDF document text
    • https://tamipabofoj.weebly.com/uploads/1/3/4/8/134876193/webegowuza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423442/normal_6018f3e277dc3.pdfIn PDF document text
    • http://prizinsta24.space/9100501737079oat.pdfIn PDF document text
    • https://mokovudome.weebly.com/uploads/1/3/4/5/134598928/1345034.pdfIn PDF document text
    • http://shoop-fl.ru/28752014707miuka.pdfIn PDF document text
    • https://notefusiwedamap.weebly.com/uploads/1/3/4/8/134872173/2ace72a6.pdfIn PDF document text
    • https://dusonibegoxat.weebly.com/uploads/1/3/1/3/131380688/wozofa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496818/normal_601b2dfd46c58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391623/normal_5fdcd573dd54c.pdfIn PDF document text
    • https://jikuvubavul.weebly.com/uploads/1/3/5/9/135964228/9e67e2a2742d.pdfIn PDF document text
    • http://losqutoq.online/vedujebejomipirego4557r.pdfIn PDF document text
    • https://lumodafudewose.weebly.com/uploads/1/3/4/4/134480169/2093964.pdfIn PDF document text
    • https://bulugigedi.weebly.com/uploads/1/3/4/7/134714886/0bbb57c6ace9967.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vemesedesalo.rf.gd/96804593376.pdfIn PDF document text
    • http://vopapokolozanum.rf.gd/ashoka_tamil_movie_tamilrockers.pdfIn PDF document text
    • http://kugilib.rf.gd/inspection_report_software_free.pdfIn PDF document text
    • http://fabodatutowew.epizy.com/shawn_mendes_and_camila_vma_performance.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_off0000dca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA2 5228 bytes
SHA-256: c67ecf8b0daece9389b14b368b67c0c7ab6528ef405aba1ee6d290060cd16c06
font_01_sfnt_off0000ee63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE63 10372 bytes
SHA-256: fbfd7bc54c335136bd96e943e496d1a286c5b5865e5d30f498f0ae7b71e5f5d0

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