Malicious PDF — malware analysis report

Static analysis result for SHA-256 463d72fa61b3e7d0…

MALICIOUS

PDF

96.2 KB Created: 2021-04-14 15:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ef7cc6aeff6809394ce2e44effe4c9a5 SHA-1: 7c134bc0c926db1ae41b1f43e09362ba723faf99 SHA-256: 463d72fa61b3e7d0403dafd0c9292f44800d21ddcb4b333a75903236680ed6c5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

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://xajibur.ru/strik?utm_term=weed+eater+featherlite+fl20+price PDF link annotation
    • http://mebelintera.ru/uc_browser_4g_download4qii0.pdfIn PDF document text
    • http://soul-felt.com/emergency_contacts_form_for_qfes_monitored_fire_alarmsfwj0v.pdfIn PDF document text
    • http://tersq.fun/washington_crossing_the_delaware_painting_analysisacbak.pdfIn PDF document text
    • http://microbladingcertificationdfw.org/luralipurodalapwqa1.pdfIn PDF document text
    • http://getne.xyz/yooka_laylee_and_the_impossible_lair_guidexfetg.pdfIn PDF document text
    • https://fevenegor.weebly.com/uploads/1/3/1/3/131380973/sobewowepiruw_gokilujib.pdfIn PDF document text
    • http://theraisins.pro/wajajiwogazilaljnxay.pdfIn PDF document text
    • http://shtangennstutkupitseychas.xyz/345991094194ys8d.pdfIn PDF document text
    • http://tomogorman.com/3749780047301fci.pdfIn PDF document text
    • https://wesojejupeledaw.weebly.com/uploads/1/3/4/4/134446418/ca48dae4433194.pdfIn PDF document text
    • https://kivuvuvilex.weebly.com/uploads/1/3/2/7/132741385/5bf57b.pdfIn PDF document text
    • http://remontvorot24.com/kitchenaid_artisan_5ksm175psb_stand_mixer_-_whitedvex8.pdfIn PDF document text
    • http://nigma24invest.online/sapoweridoxesijuzuliwenwedwj.pdfIn PDF document text
    • http://oneplusonemain.xyz/23066006964qbnh.pdfIn PDF document text
    • http://funseeds.site/when_was_the_polaroid_onestep_600_madeg8r4h.pdfIn PDF document text
    • http://wownatural.fun/zojirushi_rice_cooker_instructions_oatmealjb2dp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kukejisagev.epizy.com/35001773986.pdfIn PDF document text
    • http://kunipotow.epizy.com/89401744484.pdfIn PDF document text
    • http://xiruvexo.rf.gd/anuria_oliguria_poliuria_valores.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_off00013655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13655 5352 bytes
SHA-256: f8c0cbc7495a033421367d15cd116173b64cb4cd068d81b8243a320ed0e75752
font_01_sfnt_off00014895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14895 13112 bytes
SHA-256: e56d3ff522ab0d68313fe4b499974db84b62895b1a14d7f1c6c7978b164992c9

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