Malicious PDF — malware analysis report

Static analysis result for SHA-256 571286a071d3a028…

MALICIOUS

PDF

75.7 KB Created: 2021-03-05 15:14:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 193820e80f58542c92da50d2d53d60c0 SHA-1: 2a47ab79fd2e908f21b349c74da226f0c4231298 SHA-256: 571286a071d3a028a85b47bf7601c056cf6287f985b2d604b5a735180fca3537
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. While no scripts were extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/strik?utm_term=cuisinart+burr+grind+and+brew+coffee+maker PDF link annotation
    • http://presente-top.store/2005_honda_accord_maintenance_required_light_resetvtil3.pdfIn PDF document text
    • http://chemistryplus.space/paypal_account_set_up_fraudulentlybwlqk.pdfIn PDF document text
    • http://duvejiwuxikon.getenjoyment.net/english_vocabulary_level_test.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/wisdom_of_solomon_5.pdfIn PDF document text
    • http://nosinoski.shop/6991589338j8sxl.pdfIn PDF document text
    • https://cdn.sqhk.co/fowipovoji/fhivECy/5791992545.pdfIn PDF document text
    • http://nazhivy.net/how_to_install_forward_facing_britax_boulevardfeej7.pdfIn PDF document text
    • http://power-guard.shop/corrugated_galvanized_steel_sheets_for_roofqkkhe.pdfIn PDF document text
    • https://cdn.sqhk.co/zigotimuti/ijUMygj/16892645415.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxokakijefe/bigLhgw/shur_line_paint_brush.pdfIn PDF document text
    • http://rastet-malysh.ru/29232331579uv0h5.pdfIn PDF document text
    • http://auto-fishing-rods1.club/how_to_learn_spanish_for_beginnerswefrp.pdfIn PDF document text
    • http://zumbayuliya.online/felozagixamavisamuvixh5xdg.pdfIn PDF document text
    • https://cdn.sqhk.co/zoribakim/Mhbwgia/2315388292.pdfIn PDF document text
    • http://storeyou.store/gakusamatijobengpwtu.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/zhchhig/billie_eilish_net_worth_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buzanuziti.myartsonline.com/whos_still_alive_from_white_christmas.pdfIn PDF document text
    • http://jomopizemiz.onlinewebshop.net/25084488505.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_off0000e9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D2 5512 bytes
SHA-256: e81ff9041b76a976204575f1d6a98e50777b9bfdfe5e41b2695ab3bcaaea47ba
font_01_sfnt_off0000fc8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8E 10896 bytes
SHA-256: e27d3417793c8cc1f399e44187a2d51a680e9715f3e6e4295681b6feda8b3afc

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