Malicious PDF — malware analysis report

Static analysis result for SHA-256 a21f55ad81ac636e…

MALICIOUS

PDF

76.9 KB Created: 2021-04-23 03:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b1ca08cda0e8fe8088fdad6297574e1a SHA-1: 7d636224d48d979200e119cdfceea68b2963e18b SHA-256: a21f55ad81ac636ed69ba49c3e4acf6d607bde625776ad8c32dfcd35344d912d
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The document contains numerous embedded URLs, many of which point to disposable domains and link farms, suggesting a phishing or malware distribution campaign. The presence of external URIs and the overall structure indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=stacking+kit+for+washer+and+dryer+india PDF link annotation
    • https://cdn.sqhk.co/gaximeme/dTSDijj/kegenolevizi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456378/normal_604696fc46579.pdfIn PDF document text
    • https://cdn.sqhk.co/wolanojijen/bI14zge/33705660168.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368951/normal_5ffc69ad4b9be.pdfIn PDF document text
    • http://eurofamily.pro/napomake4ck83.pdfIn PDF document text
    • https://cdn.sqhk.co/zexoribuj/Whdgiij/bid_snipe_ebay.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453327/normal_603b6a5660a7e.pdfIn PDF document text
    • http://znakomstva18x.site/bow_tie_cinema_saratoga_parking87r8p.pdfIn PDF document text
    • http://genoray.pro/annamayya_movie_mp4uf4ay.pdfIn PDF document text
    • http://teagreen.space/62581129322a8wzu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469626/normal_600956bdc1c47.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391340/normal_5ffc562ee10d5.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/7361947327090v9q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472760/normal_5fc7e05c36792.pdfIn PDF document text
    • http://bioforce-co.site/hp_officejet_6500a_parts_list3tmjh.pdfIn PDF document text
    • http://vezerfa.xyz/speed_vs_upload_speed_ps4js2nn.pdfIn PDF document text
    • http://cleanup-sale.site/are_electrolytes_acidic_or_basichg7ua.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/igie7ji/tv_guide_nfl_games_today.pdfIn PDF document text
    • http://pitushok.fun/50186844906svj1q.pdfIn PDF document text
    • http://bigtittybella.com/powebusitemknhws.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a1caaca2-2281-43ca-b2b5-e8dcf6f2a4ec.filesusr.com/ugd/c6e36d_0f14446ccbe446e98cfa476240c2c687.pdf?index=trueIn PDF document text
    • https://f5d5bca3-0ffd-41e3-a77d-3d805a1e43e5.filesusr.com/ugd/4e23ca_311440f5e51a463a8a62d236e00312ab.pdf?index=trueIn 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_off0000ee47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE47 5612 bytes
SHA-256: 4a8d520b514afcf9b047cba611cf744a8ea9161d7618c39d3323d01fb5b2bf2c
font_01_sfnt_off00010171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10171 10776 bytes
SHA-256: e8801cdb5294d0619875e5e0f5b9f57cc51c33aca99565e1363de21a828a5198

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