Malicious PDF — malware analysis report

Static analysis result for SHA-256 79244ac8e086eb88…

MALICIOUS

PDF

79.3 KB Created: 2021-03-28 08:15:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 178f0ee490de72ba6fc0c1a0034f40eb SHA-1: 491541b9e57da50627f2ed98686758e0445fd0ad SHA-256: 79244ac8e086eb88273cb9cfa1c16d8c0da7e82a9f7880475a1d29a8ad95ada5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. The document contains numerous embedded URLs, with one specifically pointing to 'dugedepap.ru', suggesting a lure to external malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=2005+chevy+cavalier+manual+for+sale PDF link annotation
    • https://lasubapomi.weebly.com/uploads/1/3/0/7/130776640/793985.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_6033a97c87d71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459055/normal_5fd11920a23e7.pdfIn PDF document text
    • http://lerob.info/654393989603839t.pdfIn PDF document text
    • http://mavpa.fun/what_age_is_coraline_suitable_forrcdzp.pdfIn PDF document text
    • http://eslivdrug.space/tojagii3wdk.pdfIn PDF document text
    • https://vulodimov.weebly.com/uploads/1/3/4/8/134880101/satepikafede-rewalamigiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424689/normal_604a45121e19b.pdfIn PDF document text
    • https://xotozefubineru.weebly.com/uploads/1/3/4/5/134576546/wefupof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404725/normal_60110680e41c8.pdfIn PDF document text
    • http://firstdoctor.xyz/liszt_la_campanella_sheet_music7pran.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ac263381-fdad-4fda-ae78-6df6d71032d6.filesusr.com/ugd/25c42e_ccb1494484204d2187617ad47c74985b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/45750893655.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/povamulunif.pdfIn PDF document text
    • https://7f1d4f38-7308-4051-b389-b8ed31312188.filesusr.com/ugd/e948c1_7a5f0c7b118f44f9b5fbba4ee1ee05d5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/kidde_smoke_detector_double_beep.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/formato_certificado_de_origen_colombia_brasil.pdfIn PDF document text
    • https://ff8eac81-0dee-4da4-b7c1-1dee070544a7.filesusr.com/ugd/2637cf_19f8c14cbb2544968515bdbb83802126.pdf?index=trueIn PDF document text
    • https://0face946-3507-4f1d-9804-30df5ac990e4.filesusr.com/ugd/8dfcc1_117b051926034fc385c79d8f6387d305.pdf?index=trueIn PDF document text
    • https://63b1f34b-4847-450f-8d9a-4788d10e1cf5.filesusr.com/ugd/451a43_c438827e8f224f13aa794c905debfa42.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gazitif/how_to_play_blackbird_on_guitar_notes.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_off0000f72d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72D 5588 bytes
SHA-256: 849696cae472888fe58689a98021123e5a8187734bd659268e478a75ddf77561
font_01_sfnt_off00010a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A14 11004 bytes
SHA-256: b2367cb60ea963362816f84e17f2e449f518771d396f5c9384818a9362e13daf

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