Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ca59425c5ae1685…

MALICIOUS

PDF

75.8 KB Created: 2021-03-16 04:17:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf5fb3b3dcdbd6cc2143b5cb1f37c21c SHA-1: 1017d536cc7093d808832a3e6a354579af69eeee SHA-256: 3ca59425c5ae1685cdb9a8495e3962763ff904b4e67c02d4b0008f68120ee7a7
156 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 of which are SEO-themed, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic confirm the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/strik?utm_term=where%2527s+waldo+vans+journey
    • http://keepxufi.space/how_to_make_yourself_miserable_dan_greenburghnyr7.pdf
    • http://lnstagramverifiedbadgeservice.com/73965393306gwiy5.pdf
    • http://robolab.one/proform_power_995_treadmill_for_sale9ewuw.pdf
    • http://instapriz365.online/zulojeginiwurijuepj0.pdf
    • http://detonic-hypertonie.website/pikiterigepitevi9an78.pdf
    • http://detonic-buy.website/stellaris_federation_guidelh44v.pdf
    • http://pitushok.fun/xipaguzemolezevadi4nd32.pdf
    • http://gutprod.xyz/training_mandays_calculation_formula_in_excel3zz96.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c4ed5948-de90-4b80-a086-abd1827da339/hatchet_book_and_movie_comparison_worksheet.pdf
    • https://5a995288-ce6f-4ae3-a3e6-14272d8003db.filesusr.com/ugd/7be1cd_0b64cc120dd746ee9c2ac92b921d7a0d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5dcdea0a-2edf-4474-820b-44f1dc698465/seismic_load_calculation_as_per_eurocode.pdf
    • https://510adc33-753b-44c0-977e-8d34da8fcdd4.filesusr.com/ugd/5f4192_98708e83e492446aa8094ffbb8093873.pdf?index=true
    • https://uploads.strikinglycdn.com/files/bbbb6d36-42fc-47bc-a3fc-2d12a5fc5081/how_many_calories_in_a_wendys_baked_potato_with_chili.pdf
    • https://ac402fee-74f4-49a6-b5a4-6a03c6a057de.filesusr.com/ugd/b0cd75_261f052fea604bcb84f2229f990ff180.pdf?index=true
    • https://uploads.strikinglycdn.com/files/10d3af9f-894d-42a1-9b5e-f63140fb5ca9/teologia_biblica_y_sistematica_myer_pearlman_editorial_vida.pdf
    • https://uploads.strikinglycdn.com/files/6f9e5ce6-5929-4391-ad5e-dd164fd30dde/best_dungeons_and_dragons_5e_books.pdf
    • https://uploads.strikinglycdn.com/files/15944012-40fc-47e2-88ed-15573e9ce9e7/how_to_argue_with_logic.pdf
    • https://790985df-dfec-4a08-b509-00f37668cf87.filesusr.com/ugd/a421e3_63f92f10764a44ca9d3743c12ebc5b70.pdf?index=true
    • https://8d684a1e-4078-49cd-b336-05adf09473b6.filesusr.com/ugd/2b25e8_7772d331697340609777519f665a7d49.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f8a2babb-2209-4a95-be12-72b535064b93/how_to_record_dividend_declared_journal_entry.pdf
    • https://c580675e-8888-491d-8c80-3106eaac86fb.filesusr.com/ugd/c8a981_ca255b7082b6464abc5760a8fe742ef5.pdf?index=true
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_33af3367db9747169fe015dc91493180.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e2.bin
920bca7655887a1f5cbe7edfcc4557ce49cbb6b201a5c4f2f9c10839852029d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E2 5288 bytes
font_01_sfnt_off0000fbfb.bin
9c7218d8802e6f20f4b042140905c65925a506579d3e3b5544774e7df5781ef2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFB 11032 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.