Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc04327191a2c2b…

MALICIOUS

PDF

88.3 KB Created: 2021-04-03 06:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2edd3665a7ed02ca75cc303b47772988 SHA-1: 9747fa5f0f0571655ee7be553f62744fb2f2278f SHA-256: dbc04327191a2c2b9427cdd17d5320abcc10590dc1aa3bde89f2b34b86b7f3eb
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain known for phishing. Heuristics indicate the PDF is a link farm on disposable hosting and ML classifiers strongly flag it as malicious. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://soxebez.ru/strik?utm_term=innova+code+reader+3100j PDF link annotation
    • http://world-wildshop.com/344426065163fpxh.pdfIn PDF document text
    • http://beach-fruit.fun/8109724491220i32.pdfIn PDF document text
    • http://daddytestit.xyz/steam_link_as_chromecastxioru.pdfIn PDF document text
    • https://cdn.sqhk.co/romemanir/cdibMhc/risibofirunomekotinusobun.pdfIn PDF document text
    • http://gratoraama.website/28267062945mz5yu.pdfIn PDF document text
    • http://fruit-ital.space/livro_antigo_testamento_interpretadoctzdu.pdfIn PDF document text
    • http://ridunculus.com/snap_on_1_2_digital_torque_wrench_atech3fr250bez51c.pdfIn PDF document text
    • https://cdn.sqhk.co/wowebajix/jwJhes2/uj_bcom_accounting_modules.pdfIn PDF document text
    • https://cdn.sqhk.co/nasanoroge/ifrOfjh/34314760835.pdfIn PDF document text
    • https://cdn.sqhk.co/gasupewu/iZwhije/gw2_super_adventure_box_world_2.pdfIn PDF document text
    • http://biolinkus.me/44000830974wqits.pdfIn PDF document text
    • http://forkidsshop.online/lasonifoximufavamutevoduftl52w.pdfIn PDF document text
    • http://blancer.xyz/what_are_the_8_different_systems_of_the_human_bodyr7viu.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/536dbbc3-856a-4143-a471-a308e3b26f37/64578370328.pdfIn PDF document text
    • https://849bdae7-2456-4570-9e2a-fc769e7e49ad.filesusr.com/ugd/2074c9_63b0d2e350dc4c6ba43a16edf56eaf45.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/55a23042-daf0-404d-9933-40d0eb5c156d/easy_ukulele_songs_with_2_chords.pdfIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_b36a9a3b54724fab8d3a04ff9ca3095e.pdf?index=trueIn PDF document text
    • https://94226b1b-8363-4ad6-a779-e61b7b16ff5b.filesusr.com/ugd/b3bc21_3daf4df6421e4a488d558679f32be99a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6bd4e3a-a548-479e-9554-cc8ffaa185a3/images_of_harry_potter_characters_then_and_now.pdfIn PDF document text
    • https://c83cbd6e-a134-4b49-ba12-49f24c654ad9.filesusr.com/ugd/904a8b_48cf34a29d0f4c2eaa4feda35a7d96a9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd83ea09-9795-4c07-aaea-ccee84f45e26/is_adjustable_base_worth_it.pdfIn PDF document text
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_44061d144bf24a46abc72719a35a229e.pdf?index=trueIn PDF document text
    • https://44407f20-7244-4107-9544-84d8151b6f9a.filesusr.com/ugd/8508de_3eb4fa78305646ebbdbc24ec1080adb8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/57b71fc8-5be9-45a0-90e0-58c9ed9fdcee/dnd_5e_wand_of_true_polymorph.pdfIn PDF document text
    • https://11627308-8c8f-4f08-99ed-0ad85160907d.filesusr.com/ugd/682d1c_489a6109ba8640e2b1e2501bc1c40d31.pdf?index=trueIn 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_off00011941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11941 5152 bytes
SHA-256: fb93fb3c8b6b3a52e5c9689bc37111fc932976a3f1cc57b8a64b0fa83b0920de
font_01_sfnt_off00012ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE7 12168 bytes
SHA-256: 09f2bdeb5e83077bd7fbffc8b4cf57741c8c7b59dfaf3a333821d7795552faf4