Malicious PDF — malware analysis report

Static analysis result for SHA-256 220108cdf8b11be5…

MALICIOUS

PDF

74.0 KB Created: 2021-03-10 18:21:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 075a20dd16c987e1c1cbecfdf3ca2a76 SHA-1: c719bb4c7ff21cadb6c53dc0583de09cb186e4b3 SHA-256: 220108cdf8b11be524fd071f5bf75d3401aadbb3350e2a8b1f25d6140c1ea507
126 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links pointing to various domains, many of which appear to be disposable or part of a link farm. This behavior, combined with ML and ClamAV detections, strongly suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and numerous external links indicate an intent to redirect the user to malicious content.

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://jumiwimov.ru/123?utm_term=engineering+technical+report+topics PDF link annotation
    • https://cdn.sqhk.co/tipusuzog/MhaKQI9/momapafokubagusi.pdfIn PDF document text
    • https://woninulanomawij.weebly.com/uploads/1/3/4/6/134670754/1040356.pdfIn PDF document text
    • https://dedaruxije.weebly.com/uploads/1/3/4/4/134455514/jigapa.pdfIn PDF document text
    • http://lorozetuwivu.medianewsonline.com/bubonobogusuxup.pdfIn PDF document text
    • https://tefovaxosu.weebly.com/uploads/1/3/1/1/131163863/mikajuxo.pdfIn PDF document text
    • http://razvivatel.blog/what_is_the_difference_between_shortage_and_scarcity_in_economics46eaz.pdfIn PDF document text
    • https://zudimawavisutet.weebly.com/uploads/1/3/1/6/131606198/0a3e1db52b2b73.pdfIn PDF document text
    • http://zugemenelil.medianewsonline.com/how_to_use_yamaha_ypao.pdfIn PDF document text
    • http://verification-help.com/90911984001jqatn.pdfIn PDF document text
    • http://jiteruruw.sportsontheweb.net/bhagavad_gita_quotes_on_love_in_tamil.pdfIn PDF document text
    • http://ryukzak.digital/26663202332jiosc.pdfIn PDF document text
    • http://tujijamutibe.sportsontheweb.net/wupusenelobubegodelaw.pdfIn PDF document text
    • http://wixosefimaba.scienceontheweb.net/the_smartest_guy_in_the_room_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/zijigemeworu/chehghj/toxojobam.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/what_battery_does_my_g_shock_use.pdfIn PDF document text
    • https://sabiwivilo.weebly.com/uploads/1/3/4/3/134316676/bejosijajulura-gegenukipi-rivilafaget-gegato.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bigapenegig.atwebpages.com/92746294631.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/wikemetibu.pdfIn PDF document text
    • http://petojijoxura.onlinewebshop.net/how_to_put_canopy_on_chicco_bravo_stroller.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/slope_intercepts_and_graphing_equations_exam_answers.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_off0000e4f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F5 5152 bytes
SHA-256: 3b1fb592ad3bcb77dad65f6e22bd82fb43157ae76c4963b762020f2af29df989
font_01_sfnt_off0000f682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF682 10760 bytes
SHA-256: 167b6deed1cca066cc622b207136edf751f20c525c11516828a366bf25fec08c

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