Malicious PDF — malware analysis report

Static analysis result for SHA-256 23923b6e4b3e67c7…

MALICIOUS

PDF

124.2 KB Created: 2021-03-23 02:21:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7801f064efda7a70044460499cdb2d3d SHA-1: 7fda316c65d9ff93d834abee40417871900129ab SHA-256: 23923b6e4b3e67c744fc6af8728f366051c39a93a3ab546d3c4439cdd97c9db5
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect users to compromised or malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://druttle.ru/wix?keyword=down+to+earth+sociology+introductory+readings+pdf PDF link annotation
    • https://cdn.sqhk.co/bozadukopufu/dFheZVR/stellio_music_player_pro_apk_free_download.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/briggs_and_stratton_carburetor_repair_video3bg29.pdfIn PDF document text
    • https://safesawugu.weebly.com/uploads/1/3/2/8/132814337/01b707.pdfIn PDF document text
    • http://meetdouche.xyz/how_to_connect_ihome_bluetooth_mouse8mryb.pdfIn PDF document text
    • http://albl.ru/ponatapewalone0x5ri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484605/normal_60299d0796dd9.pdfIn PDF document text
    • https://logekififej.weebly.com/uploads/1/3/4/5/134502341/zenubesorezobogeko.pdfIn PDF document text
    • https://cdn.sqhk.co/wezokobuli/jfMIgdh/tojaduvodimalitupuresu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448103/normal_60507eb68831c.pdfIn PDF document text
    • http://vulgargirls.fun/xepujider7nh4s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443602/normal_6043ff14bc989.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457008/normal_5fce0727b03be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370989/normal_5fd08876a7bd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414156/normal_6010d88188ade.pdfIn PDF document text
    • https://gisodotok.weebly.com/uploads/1/3/5/9/135971357/9251570.pdfIn PDF document text
    • https://cdn.sqhk.co/burexewejam/iiNsUhj/good_pick_me_up_songs.pdfIn PDF document text
    • http://meetly.space/jojowetagogoreledazebuzervc5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404293/normal_5fd8618b93a3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454425/normal_601e6e7302fc5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fab5423-158f-47d4-b9dd-786886346aca/3000_calorie_meal_plan_to_lose_weight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16e83dfc-fce0-41d8-b076-91fb0358bdee/71705963437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b785cab-acfb-4645-83cf-e1b2cc8311f0/do_you_need_training_to_be_a_vet_tech.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9bc36fe-eb14-4f5f-b92b-e6c75a7add3c/how_to_be_a_bawse_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72238ff3-0e88-441c-ae9e-ca9e86d16f8a/fufulasom.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_off0001ab35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB35 5612 bytes
SHA-256: dac2b490aa987de830ef66b5669eb69e29d7095e3b92684697cf441fb03165e2
font_01_sfnt_off0001be6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE6A 10744 bytes
SHA-256: a9a42692959cfac8b20db91510b37e0cb5674e224b1be5276f147752e0675be8