Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2ecd2e2909a0d9c…

MALICIOUS

PDF

81.4 KB Created: 2021-03-11 18:51:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 84cf869a182db3bb74c190a167778e82 SHA-1: d3c4508873fdae5d5901eaba0b62e44c9d22ee99 SHA-256: f2ecd2e2909a0d9ca6f852368d944acaf7704f37b933454a53c2b77beb25b997
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains or Weebly, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, with the file being identified as a phishing trojan. The embedded URLs are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 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.
  • 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://dugedepap.ru/123?utm_term=business+income+worksheet+acord PDF link annotation
    • https://kunolutupevuj.weebly.com/uploads/1/3/4/7/134772201/bipiwalotorowew_vepej.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/Jhjgcjh/marble_blast_2013.pdfIn PDF document text
    • https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/772ae4d3ed2baff.pdfIn PDF document text
    • http://phrensy.co/bomeduxoputojanas5056c.pdfIn PDF document text
    • http://kieverts.xyz/faxakalemigujatuwpami.pdfIn PDF document text
    • https://bufotikebejunut.weebly.com/uploads/1/3/1/3/131398235/336055ae.pdfIn PDF document text
    • http://worldworkbook.com/saderakeselakofrdp2d.pdfIn PDF document text
    • http://sajiwurejedetu.sportsontheweb.net/23790532835.pdfIn PDF document text
    • https://dowusezawidi.weebly.com/uploads/1/3/3/9/133997386/4188089.pdfIn PDF document text
    • http://fakaripeti.xyz/fikebevusipurekaru89ua4.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/ixgdhdn/planet_io_movie.pdfIn PDF document text
    • http://oneshops.space/sport_vocabulary_exercisej849y.pdfIn PDF document text
    • http://mazanatur.space/tunezixixowixolurogamxa1q.pdfIn PDF document text
    • https://sabumamopadav.weebly.com/uploads/1/3/5/9/135957329/wadejaxikefir-reredavakefe-rujonunaw.pdfIn PDF document text
    • http://thehensleys.org/edenpure_heaters_for_saleqsyju.pdfIn PDF document text
    • https://wabodaji.weebly.com/uploads/1/3/2/6/132681772/37bcbac745294.pdfIn PDF document text
    • https://cdn.sqhk.co/demawanetufi/bhehjge/worevewigopoxudoko.pdfIn PDF document text
    • http://mailedflkf.site/download_film_jackie_chan_around_the_world_in_80_daysdcwn5.pdfIn PDF document text
    • https://cdn.sqhk.co/pesamelez/jjMzheH/4m_rocket_race_car_kit.pdfIn PDF document text
    • http://carbags.site/harwin_connectors_data_sheetzr4vd.pdfIn PDF document text
    • https://pulapafux.weebly.com/uploads/1/3/0/8/130874232/5129b3.pdfIn PDF document text
    • https://cdn.sqhk.co/wedekimelol/haieAYC/dojowodeget.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fajenadiwizowo.atwebpages.com/mec_bncc_educao_infantil_2020.pdfIn PDF document text
    • http://megigezorozo.atwebpages.com/how_to_draw_a_face_anime_girl.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_off00010054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10054 5352 bytes
SHA-256: f3d39ea472865488f2ecd163c9b20298f3b6ce294cb81682dace0a7abaf4a2d8
font_01_sfnt_off00011271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11271 11344 bytes
SHA-256: 3569faae74e7ae6bd7c4a82062edd5e76f2b1d648383567bd6fc4d83fbf5896a

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