Malicious PDF — malware analysis report

Static analysis result for SHA-256 f475bf7700b9680a…

MALICIOUS

PDF

76.2 KB Created: 2021-03-30 02:42:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c0e973268a1a13616a91122c7c89e687 SHA-1: ca58e37bc488ce5feb297fd8927c050544e41063 SHA-256: f475bf7700b9680a65f6aa49e20f3268914b8b3a66ece14f5be67f1e2dfcab50
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic indicating it is a link farm on disposable hosting, directing users to a URL that appears to be a phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

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://jottigo.ru/strik?utm_term=what+is+the+best+way+to+clean+your+stove+top+grates PDF link annotation
    • http://takipleskazan.org/is_the_stock_market_on_christmas_eveat1sw.pdfIn PDF document text
    • http://autolombardpro.ru/mitel_5448_programmable_key_module_template22gk9.pdfIn PDF document text
    • https://pudisemibupar.weebly.com/uploads/1/3/4/0/134096773/1904665.pdfIn PDF document text
    • https://rukuzidin.weebly.com/uploads/1/3/4/5/134517246/xofur-nujuvogake-xukifunedado-rurenexibesa.pdfIn PDF document text
    • http://ourfanz.com/big_green_egg_cookbook_celebrating_the_ultimate_cooking_experienceh0htg.pdfIn PDF document text
    • http://about-central.com/does_planet_fitness_have_a_yearly_membershipe0v8a.pdfIn PDF document text
    • http://instasale.company/how_to_change_my_lg_tv_from_black_and_white_to_color4n850.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/911db2aa-b530-484f-b726-47be77ce33c5/tevipafexepubofuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e172b41-6bbb-4f5a-bd4e-eb254920ef3e/mamubakolewome.pdfIn PDF document text
    • http://rojegasofibi.epizy.com/boundary_layer_theory_springer.pdfIn PDF document text
    • http://sozanorokov.epizy.com/what_is_a_candlestick_chart.pdfIn PDF document text
    • https://56c41596-c8b3-4aa7-a075-23c9724d7f97.filesusr.com/ugd/ed77b2_4fa002c6be424e3ca8cf86879e89f4ae.pdf?index=trueIn PDF document text
    • http://fepapagibonu.rf.gd/800_thread_count_egyptian_cotton_sheets_king.pdfIn PDF document text
    • https://44407f20-7244-4107-9544-84d8151b6f9a.filesusr.com/ugd/8508de_90c6a0f72b4841fb803660f6f977bf3b.pdf?index=trueIn PDF document text
    • http://zozadugaweguj.epizy.com/maglev_wind_turbine_with_ppt_seminar_report.pdfIn PDF document text
    • http://pijedawometuzov.epizy.com/learn_basic_thai_language.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7940eeba-81b6-463e-970b-c609f33d3b80/nisenesoterezozakawodiza.pdfIn PDF document text
    • http://sipukerafabule.epizy.com/neurokinetic_therapy_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1461ec6f-2993-4af0-b200-569a2e47c0b3/84798188700.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_off0000eb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB99 5604 bytes
SHA-256: 41fdd6ca06d3e760aa1bf2f505fb494257c69d70bae301cd16b55daafe39fbad
font_01_sfnt_off0000feca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECA 10188 bytes
SHA-256: ada62cebb74b006036117170ef7c64aefdbbf1b9a4a7a11a14a7180411ccd649

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