Malicious PDF — malware analysis report

Static analysis result for SHA-256 e84a181197661d4d…

MALICIOUS

PDF

73.4 KB Created: 2021-03-01 00:58:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f17a70b3f53670ce85ab0c7093e98b24 SHA-1: 11f692cd18e6379001a29105c6d0e81173f1862c SHA-256: e84a181197661d4d833c1bb4a78acaea98ca011b164b3d9a87a6f296b44d7070
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://mezovuduw.ru/123?utm_term=the+hound+of+the+baskervilles+1983+cast PDF link annotation
    • https://xijaxerunoseme.weebly.com/uploads/1/3/4/3/134306079/43d600dfe920c.pdfIn PDF document text
    • http://lukanovetefitef.22web.org/54433475505.pdfIn PDF document text
    • https://tudexabi.weebly.com/uploads/1/3/4/7/134770635/dakuvopares-domedowuta.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479433/normal_5fe1423ab3960.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/31ejagc/best_dual_monitor_home_office_desk.pdfIn PDF document text
    • https://cdn.sqhk.co/pulununese/iRhhyGi/nasty_gal_dresses_midi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424985/normal_5fe59651edc0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415742/normal_5fc931c33560f.pdfIn PDF document text
    • http://itravelgr.com/icao_doc_9774_manual_on_certification_of_aerodromesovyoe.pdfIn PDF document text
    • http://drive4mclanemilwaukee.com/34935406752611tf.pdfIn PDF document text
    • https://cdn.sqhk.co/bokapapukopa/aifSFXG/pemavetixabegitazevur.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobuwaxegu/widHaV0/gojutanomof.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/dxhcicx/xesozunuxona.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rugokabiko.epizy.com/sexow.pdfIn PDF document text
    • http://sosozodazu.epizy.com/gitowupavinaxudexutekulul.pdfIn PDF document text
    • http://lalavuzotijosi.epizy.com/77098107654.pdfIn PDF document text
    • http://daforewepon.epizy.com/social_media_calendar_template_2019.pdfIn PDF document text
    • http://mawabubobiniz.rf.gd/daforovufexo.pdfIn PDF document text
    • http://tuvakaj.epizy.com/the_maze_runner_online_book_with_page_numbers.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_off0000df3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3F 5888 bytes
SHA-256: 42c2529befb207ea5b00be13bf72a329cead19f0a5f89b579d2dce9f5f2f5dab
font_01_sfnt_off0000f34c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34C 10820 bytes
SHA-256: ac4338b092e928785d023477b4c58128e6b5ee38355f252d41ede6b8e51bfd0d