Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b1d626ec922169a…

MALICIOUS

PDF

81.6 KB Created: 2021-06-03 01:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 829ac49b865e8f8e645b62b861ef7a61 SHA-1: aa97fa674812e604abc6fcfbf71df221f9a68a2e SHA-256: 7b1d626ec922169aef9ec9c6cdc67bfc28171927fe175e8789ef99c0cd0e1297
126 Risk Score

Malware Insights

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

This PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier, indicating malicious intent. The document contains numerous external URLs, many of which are hosted on disposable domains, suggesting a link farm or redirection mechanism. The primary malicious URL identified is https://dugedepap.ru/123?utm_term=sports+card+template+photoshop+free, which likely serves as a download or redirection point for further malicious activity.

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://dugedepap.ru/123?utm_term=sports+card+template+photoshop+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455183/normal_604ee59c045d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421036/normal_6023f339a3c48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410201/normal_601ee4feb0bab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pebokuvog.pbworks.com/w/file/fetch/144501645/how_to_print_a_piece_of_paper.pdfIn PDF document text
    • http://kimotamiju.pbworks.com/f/36209379775.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a40f21e-43b1-4b6a-ba7d-5991f85ece54/fundamental_theorem_of_calculus_and_definite_integrals_homework.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f920e888-f749-48ed-8f2b-e26d966588c1/good_night_full_moon_quotes.pdfIn PDF document text
    • http://vifogajo.pbworks.com/f/modern_warfare_3_bots_mod_ps3.pdfIn PDF document text
    • http://ruwomodanom.pbworks.com/w/file/fetch/144473976/adobe_premiere_cs6_portable_32_bit_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/301a821b-7717-4876-b3ef-e739b5991ece/fender_mustang_gt_100_amp_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9edd115-c0a4-4961-8342-763b206457bb/baveduvovenip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dd0538c-e1af-405b-9c81-a0e1c5ffacd9/88814159456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5b6c343-dc9d-4f9c-9752-278e122fa75a/sunbeam_warm_mist_vaporizer_instructions.pdfIn PDF document text
    • http://kivupored.pbworks.com/f/descargar_el_arte_de_expresarse_con_el_cuerpo_completo_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/042c0758-0bb7-4033-932a-7e9183694b35/tiwejezovadimere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64d96084-28dc-4e33-b3f0-198c66784766/2137099219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a67fa4b7-8d6d-464e-8434-187c61e80602/xadofebikalenebixepafabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3efac8f3-f0bd-4a8f-8e78-4230e8acbca7/voluripezudozuvolitiweg.pdfIn PDF document text
    • http://zufumegi.pbworks.com/w/file/fetch/144424296/52087939418.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/085407cb-24e6-4c32-ba35-8581a9f8b468/lexus_rx_350_for_sale_by_owner_near_me.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_off0000ff22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF22 5500 bytes
SHA-256: 47ea92b7a5cce2e56f35e7a5e571a312308e175fc51dec791856234946dfe5af
font_01_sfnt_off000111ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111AE 11780 bytes
SHA-256: 1b9dcf79a84db7d85059e6a4b6835ffe835cbfd8862f5b2e0ac16f7033d45b68