Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd43237691a70136…

MALICIOUS

PDF

77.2 KB Created: 2021-03-22 21:58:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9b88bd4dcba74aa92cd91dad0d3b72ea SHA-1: 59362658da50da5e597625a84345b973dcb68aad SHA-256: fd43237691a701369dd0e369c175ee7a5897cb7be91a207e4a8a05c9b66e11c5
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the presence of embedded URLs and the overall structure point towards a phishing lure disguised as a legal document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/strik?utm_term=contract+law+examples+of+invitation+to+treat PDF link annotation
    • http://wupupetobuzune.22web.org/mewegitadi.pdfIn PDF document text
    • http://future-techno.ru/rukadidefazuja6dzf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_6011c705cbec5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413223/normal_5feb3876cf063.pdfIn PDF document text
    • https://tanofome.weebly.com/uploads/1/3/5/3/135316841/finopo.pdfIn PDF document text
    • http://verifiedbadge-lnstagram.com/ap_style_numbers_starting_sentencestq7ob.pdfIn PDF document text
    • https://lurumafija.weebly.com/uploads/1/3/0/8/130873973/radevolulikedo.pdfIn PDF document text
    • https://saremugofu.weebly.com/uploads/1/3/4/0/134017097/5181363.pdfIn PDF document text
    • http://kleomaften.online/how_to_reset_ps4_gold_headphones6yl9q.pdfIn PDF document text
    • http://tokio-2020.fun/nogirewowuvokarutopofx5mfo.pdfIn PDF document text
    • https://vifixizunegivu.weebly.com/uploads/1/3/4/3/134349865/72143.pdfIn PDF document text
    • https://zirakamu.weebly.com/uploads/1/3/1/3/131398357/12a25536a7e96.pdfIn PDF document text
    • http://save50it.info/65987656129l8ban.pdfIn PDF document text
    • https://kunimagim.weebly.com/uploads/1/3/4/6/134608209/vojojebefigefafarul.pdfIn PDF document text
    • http://yognat.space/2020_tamil_calendar_valarpirai_muhurthamlg4aj.pdfIn PDF document text
    • http://xeeewq.xyz/easy_pumpkin_carving_face_templates7lalg.pdfIn PDF document text
    • https://tetufimaburovi.weebly.com/uploads/1/3/4/0/134098130/2072857.pdfIn PDF document text
    • http://halfraire.xyz/guidewire_san_mateo_cazh0jc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385028/normal_5fe4f4c28b053.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459936/normal_604d2edf8204e.pdfIn PDF document text
    • http://bobimesufapi.iblogger.org/fiwetokasaruxoko.pdfIn PDF document text
    • https://ludamezowi.weebly.com/uploads/1/3/4/1/134131800/e55cd3c755.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tidizovebimike.epizy.com/gaxijijegawikaxojeboba.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_off0000ecad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAD 5288 bytes
SHA-256: d3f2c1eb3b2cd55a7519369ca616652c1a8c7cb37364e72a1b918e02fd745bb2
font_01_sfnt_off0000fea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA9 11380 bytes
SHA-256: a82bf6ef257fecf227a9acaaac7f2814c46f5fb83b03544ac54b8d2fdfca304a

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