Malicious PDF — malware analysis report

Static analysis result for SHA-256 55bb7b7d72ff95a6…

MALICIOUS

PDF

86.3 KB Created: 2021-03-07 07:07:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 5cd98e8af9109eb71632ea147661e52e SHA-1: 9e51b15d572ab76cb45aa9af7df40d017d62dbc5 SHA-256: 55bb7b7d72ff95a6f1d9739fddcba9aa7978deb43855c284dd56e2caae76164f
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. The document body, though partially corrupted, contains text related to a 'champion generator review' and metadata indicating it was generated by wkhtmltopdf. The presence of numerous external URLs, many pointing to disposable domains and exhibiting link farm characteristics, strongly suggests a phishing or scam attempt. The primary URL, 'https://lozipotod.ru/strik?utm_term=champion+generator+7500+review', is likely the destination for the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/strik?utm_term=champion+generator+7500+review PDF link annotation
    • http://logvoz.ru/18841128778gzna.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427501/normal_5fe6602df310e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369491/normal_5feba07477d11.pdfIn PDF document text
    • http://xolululumaw.iblogger.org/el_sistema_endocrino_esta_formado_por_unos_organos_denominados.pdfIn PDF document text
    • http://xteenware.online/vinorelekinibes3d3.pdfIn PDF document text
    • http://lnstagramverifiedbadgeservice.com/buronigijesur2vdmx.pdfIn PDF document text
    • http://org-fruit.space/botany_notes_for_class_11_downloadarsr2.pdfIn PDF document text
    • http://kersita.space/tatalusevivilegufft7pk.pdfIn PDF document text
    • http://opensoda.pro/introductory_mathematics_for_economics4banb.pdfIn PDF document text
    • http://idealicaitalia.website/escape_the_prison_unblocked_games_77zy8vs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499972/normal_60120917be395.pdfIn PDF document text
    • http://vvinorama.website/88962073275q3dmf.pdfIn PDF document text
    • http://ogranicbio.fun/15279748516t28ho.pdfIn PDF document text
    • http://temppicture.xyz/world_war_z_book_ending_redditxu3in.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369182/normal_603c4c64a2cc6.pdfIn PDF document text
    • http://winoraama.fun/gumubaxineleko98lz9.pdfIn PDF document text
    • http://ses-paypal.com/movies_hd_apk_for_ios1v1gb.pdfIn PDF document text
    • http://supportcopyright.net/spelling_numbers_1_to_1000_worksheeteiosu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sirilamezowi.epizy.com/datimedetelulujose.pdfIn PDF document text
    • http://meladuk.rf.gd/sixatelimarira.pdfIn PDF document text
    • http://gusalixofunek.epizy.com/tomapunujupano.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_off00011523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11523 5428 bytes
SHA-256: 1a43429a57675e9d3c95e167e5a137e50948c6013e9017fafd9afd3fff7cf38d
font_01_sfnt_off00012789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12789 10740 bytes
SHA-256: 21c8854a4e4eeb91234ca50d770c3c7c8ab73ba98b122936ae4be3bb42a100de

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