Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe583b2c5fd26b0…

MALICIOUS

PDF

66.6 KB Created: 2021-03-31 00:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b1ef124177f3c293bd2d2c5351f9bcb3 SHA-1: 9877766936ad013a6841436084bad8f4f8e4eb6b SHA-256: cbe583b2c5fd26b05428aa292a43ce5a4ace1876da172b69d9a0992cffb5915a
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains and Weebly hosting, indicative of a link farm. ClamAV and ML classifiers identified the file as malicious, specifically a phishing or trojan variant. While no scripts were directly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/wix?keyword=precalculus+chapter+1+review+answers PDF link annotation
    • https://xavagozewurele.weebly.com/uploads/1/3/4/5/134583143/e91ce24.pdfIn PDF document text
    • https://cdn.sqhk.co/tavevalurov/3idAVhc/crossfire_video_game_review.pdfIn PDF document text
    • https://wotawodakel.weebly.com/uploads/1/3/5/3/135316359/218aff40c.pdfIn PDF document text
    • https://cdn.sqhk.co/dewavasese/aXifsoc/axgard_polycarbonate_clear_impact-_resistant_glazing_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/nulegudup/ghhhh3o/41598361840.pdfIn PDF document text
    • https://dafufiwe.weebly.com/uploads/1/3/4/3/134368649/jajobakik_rogefesusoned.pdfIn PDF document text
    • http://esclick.pro/how_do_you_reboot_a_verizon_fios_router72z16.pdfIn PDF document text
    • https://cdn.sqhk.co/relulapezele/cUiajcS/gedazakagesenokuwomusajuz.pdfIn PDF document text
    • http://reduslim-italy.site/best_zombie_horror_manga02rnp.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/nE4mhhH/30309706640.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/6whheja/82319322615.pdfIn PDF document text
    • http://bimoriz.getenjoyment.net/buku_marxisme_untuk_pemula.pdfIn PDF document text
    • http://magnifioco.site/rock_radio_stations_denversmtr4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410674/normal_5ffb9893df5ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390052/normal_5fd12c8e1d414.pdfIn PDF document text
    • https://cdn.sqhk.co/timadupak/likIIgi/forest_king_log_splitter_specs.pdfIn PDF document text
    • https://cdn.sqhk.co/vetelojid/Bjaguhe/keep_mosquitoes_away_from_house.pdfIn PDF document text
    • http://milanbeach.fun/xesimogikosegeroruwoke3oz99.pdfIn PDF document text
    • https://tedawubav.weebly.com/uploads/1/3/4/3/134376018/sirifowo-wudovozike-vidikixexufuju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_601459f0ad09d.pdfIn PDF document text
    • http://inglassrus.ru/429281031648kowv.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/sims_3_worlds_not_showing_up.pdfIn PDF document text
    • https://cdn.sqhk.co/salulilo/gYIyznA/melurujolivitarejewuju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426696/normal_605aea2c65e31.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC894 5228 bytes
SHA-256: 7e0eda82faf5aa922d00b52c7eaea36bc819ee9a085e532b177534c5f0d3782c
font_01_sfnt_off0000da6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6B 9920 bytes
SHA-256: c02361f9cbd29a3be0df7485978ac16c86dad3b14cbf9a863948b7335301f5e7