Malicious PDF — malware analysis report

Static analysis result for SHA-256 a292035b901f2206…

MALICIOUS

PDF

98.6 KB Created: 2021-03-01 12:54:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2b3cc084913dfcd0da659318127e5af1 SHA-1: 33004bebba959f3600017ee62b93ddc2083bc417 SHA-256: a292035b901f2206ffea79f70c78eff7971ffeb2ef937b224edea46a531118fb
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or a method to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a malicious document designed to redirect users to potentially harmful sites.

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 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.
  • 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://zajinet.ru/strik?utm_term=percy+jackson+the+lightning+thief+summary+chapter+15 PDF link annotation
    • http://nitesufi.sportsontheweb.net/english_idioms_dictionary_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373755/normal_6024321c4d153.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469834/normal_5ffdc79470a42.pdfIn PDF document text
    • https://sodefabufu.weebly.com/uploads/1/3/4/4/134473286/2943266.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448096/normal_5feb57eba3657.pdfIn PDF document text
    • http://baliferifopiz.mypressonline.com/modibavutupuk.pdfIn PDF document text
    • http://termometr-medikal.site/master_the_boards_usmle_step_37u7y0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375093/normal_5fe41cb52bf12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372355/normal_600f2cf02414a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417128/normal_5ff185b66c848.pdfIn PDF document text
    • https://moxuronanupew.weebly.com/uploads/1/3/4/5/134597487/dazovut_defetewoduv_famopigakifa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374968/normal_5fe9cf863978d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485450/normal_6033613b56013.pdfIn PDF document text
    • http://pelubexeto.getenjoyment.net/strategic_management_concepts_and_cases_competitiveness_and_globalization_12th_edition_free.pdfIn PDF document text
    • http://ludirobus.getenjoyment.net/2917159724.pdfIn PDF document text
    • https://vopifubuk.weebly.com/uploads/1/3/1/6/131636719/1801037.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447460/normal_5fee99a8cd78f.pdfIn PDF document text
    • http://metalllift.ru/do_you_put_cooking_oil_in_an_air_fryerqse10.pdfIn PDF document text
    • http://frasqen.online/giteterowetikukodobe4e6ly.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13158 5848 bytes
SHA-256: 3a56617625b45ada0f41e60d998267044e5f22b5bd5d1e9bc7e292123f5203d9
font_01_sfnt_off00014539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14539 10044 bytes
SHA-256: d209b8d77375b515dffbad3128a5ce0016eda6caa30bd2d9c0e8a1dca67452b7
font_02_sfnt_off000167c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167C1 16060 bytes
SHA-256: dea42a645509e47913d94a3c1ff2e7ffecf6ca7e8d06e08a5f86f932263db97d

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