Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cb150c3f09d81b3…

MALICIOUS

PDF

75.4 KB Created: 2021-02-28 15:25:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 21bd5f2cf97b16e90587a708ca0ec796 SHA-1: ad1752c43f77c0c49f5776ea392106b2302620d7 SHA-256: 0cb150c3f09d81b3fe4ed6bc93eadacd3b20fec9eb404e78bbcdad27c1206da5
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, including one pointing to 'soxebez.ru' which is flagged as a potential phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://soxebez.ru/123?utm_term=wireless+communication+technology+blake+pdf PDF link annotation
    • http://geesecam.com/13307219993ko5nz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479223/normal_601b0f474a7d0.pdfIn PDF document text
    • http://nefuwumimo.iblogger.org/giuseppe_conte_cv.pdfIn PDF document text
    • http://fotodosajube.22web.org/goku_vs_android_17_episode.pdfIn PDF document text
    • http://drovazvenigorod.ru/non_chronological_report_writing_checklist_ks2d5sxd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389830/normal_603926150fd42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366639/normal_5fd7a75799fba.pdfIn PDF document text
    • http://usejus.pro/simplifying_radicals_worksheet_word_documentbiz72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389821/normal_5ff27419beed1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478398/normal_6009db700de0e.pdfIn PDF document text
    • http://fazoluniguket.iblogger.org/vizio_m65-c1_sound_but_no_picture.pdfIn PDF document text
    • http://witikotuxigere.scienceontheweb.net/marvel_films_in_order_of_story_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tobikinos.onlinewebshop.net/how_much_does_a_coast_guard_officer_make.pdfIn PDF document text
    • http://zunebafovako.epizy.com/are_breville_juicers_cold_press.pdfIn PDF document text
    • http://fuzimobikuxuta.epizy.com/sanozuv.pdfIn PDF document text
    • http://vilepobafomunow.atwebpages.com/vaturilapip.pdfIn PDF document text
    • http://kifarir.rf.gd/jixomesazodafogozonuze.pdfIn PDF document text
    • http://kurotilojefuvug.epizy.com/55777511271.pdfIn PDF document text
    • http://nenutufap.epizy.com/state_tax_withholding_worksheet.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_off0000e6c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C9 5888 bytes
SHA-256: 01d998e5fd093f54e7f9bc3ade6a9f2f6f61c39d064bb0bc541ef5245c1b8e56
font_01_sfnt_off0000fabb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABB 10880 bytes
SHA-256: 494c8e571375e880c3eb494665c7288eb2d6f0998c0c0d06c481b012aae99f27

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