Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a0c66d56d3f7401…

MALICIOUS

PDF

71.1 KB Created: 2021-03-02 02:58:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 2e6599faf23a51f9de1743f37eec5670 SHA-1: 5f534612825f13657f26052283f24657d3ae1bb6 SHA-256: 9a0c66d56d3f740163a2df058ed81e6765833b5f894fa3a7f53d419f26192001
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a primary one pointing to 'mezovuduw.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, indicates it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, further supporting the idea that the embedded links are the primary lure.

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://mezovuduw.ru/wix?keyword=short+and+happy+guide PDF link annotation
    • https://cdn.sqhk.co/josipinu/hicih9O/jonakexibonuweru.pdfIn PDF document text
    • https://cdn.sqhk.co/terasovo/Ghdb6Cj/49840933592.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455884/normal_603d700e17468.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450440/normal_60197c59029b5.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/jasavopobonipomo.pdfIn PDF document text
    • https://cdn.sqhk.co/xewimoziwuvo/jaFhfd2/88395796441.pdfIn PDF document text
    • http://center-san.ru/18331268720chth8.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/UijwihE/pujoturiwetakejosavevud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424036/normal_5fdf168a5164f.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/body_language_pictures_with_meanings.pdfIn PDF document text
    • http://parralax.net/30033954945po9le.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447250/normal_603d7d2e1b3ec.pdfIn PDF document text
    • https://cdn.sqhk.co/dutararopat/ghmpKih/bear_archery_recurve_bow_case.pdfIn PDF document text
    • http://mikrotikwizard.com/netflix_movies_2020_fifty_shades_of_greyx71dc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gusubozavagu.epizy.com/best_career_aptitude_test.pdfIn PDF document text
    • http://kimoviranonaf.onlinewebshop.net/51509291390.pdfIn PDF document text
    • http://nikalokibutoxes.rf.gd/bajana_patalu_songs_naa_songs.pdfIn PDF document text
    • http://pulutugorivexek.atwebpages.com/mvcc_financial_aid_email.pdfIn PDF document text
    • http://xafofeb.epizy.com/vugifoxutijanuzagunox.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_off0000dae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE2 5216 bytes
SHA-256: 9bc6c4940220abdd3162e940bf7fc582978675a790f6987617885c1123bb3298
font_01_sfnt_off0000eca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA2 10132 bytes
SHA-256: ae0be4ff92186039ebc22bda02aca1e0f35441c99ad5773952b1226de70d8c6d

Open this report in the interactive analyzer, or submit your own file for analysis.