Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d4a74f06604572e…

MALICIOUS

PDF

159.4 KB Created: 2021-03-27 11:27:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09f0a9358535773915e0657339d0de0c SHA-1: 14c50b247cb0784f5adc7d2bf10fde588a8033cd SHA-256: 2d4a74f06604572e63b7b6d32de32664edb10f820b3b998eb01fe6eb259313ae
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are likely used for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host many links, likely leading to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://xezojetit.ru/strik?utm_term=midsummer+night%2527s+dream+script+act+1+scene+1
    • http://kulotufiw.mypressonline.com/violin_scales_arpeggios.pdf
    • http://pemutoguxo.66ghz.com/fezazeg.pdf
    • https://rigafimer.weebly.com/uploads/1/3/4/9/134901715/wivezo.pdf
    • https://puwiwasoz.weebly.com/uploads/1/3/2/6/132695956/f8fb990b6df60e.pdf
    • http://jewagep.22web.org/remote_sensing_and_geographic_information_system.pdf
    • http://lemakomude.sportsontheweb.net/zimuturenatumik.pdf
    • http://bovibuvebus.getenjoyment.net/28065782920.pdf
    • http://jiteruruw.sportsontheweb.net/romance_sans_paroles_faur_partition.pdf
    • https://xugoxuxilolikat.weebly.com/uploads/1/3/4/8/134860817/lirabenotokuvi-vibevupa-dijajebatevub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b92b1c93-6cd8-4d2b-8f98-54a0cbb7060b/call_me_by_your_name_2_book_release_date.pdf
    • https://ee6bc897-aa08-459d-b6e6-b1b1d69fcba1.filesusr.com/ugd/7ba596_68511a07779e46ccab58b09b2bbefec2.pdf?index=true
    • https://832c8a8d-f05d-46e3-9166-97d9de82ace4.filesusr.com/ugd/432509_090d81fcea6447dbbbef1d52608401ad.pdf?index=true
    • https://4fe85328-8dbf-40e9-afa8-2c8d6ff8a9c8.filesusr.com/ugd/9c0842_205893353fc24ea28bce40ac3eac25e6.pdf?index=true
    • http://mojozore.myartsonline.com/bofefowevikewotunetexud.pdf
    • http://bapejilujuzegu.rf.gd/black_hole_sun_piano_sheet_music.pdf
    • https://7f1d4f38-7308-4051-b389-b8ed31312188.filesusr.com/ugd/e948c1_172108c67ef64565841d1bf952405c2a.pdf?index=true
    • https://235be7ff-9b22-41de-91df-7a9e5ced5199.filesusr.com/ugd/4fa465_ee8803fd592a4048bf944ad0795f30d0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1f297bcd-52b2-4892-a9ed-e543a6e7987f/huguenot_road_baptist_church_north_chesterfield_va.pdf
    • https://uploads.strikinglycdn.com/files/ea86cda5-88aa-4697-a4f8-18c2b5b964fc/how_to_repair_wire_headphones.pdf
    • https://8137cd1e-393d-4948-8193-eca935452849.filesusr.com/ugd/756799_26ec290250a644108d4ee7f02885374b.pdf?index=true
    • https://d0bf7e8b-5449-41c0-93e9-161603c0719f.filesusr.com/ugd/197ed4_5ad40fb40de24e09afad30f2364b0353.pdf?index=true
    • https://7b9449e5-51e9-4a7e-81f5-8587c42320f9.filesusr.com/ugd/571bad_d4e404d3cefe4f85a9cc5843f1161aad.pdf?index=true
    • https://30c74dc1-c3f2-4e71-8253-1ec84f3b94e1.filesusr.com/ugd/b8c6fa_4d3f2b134c2944b3a67085736803b28c.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_off00023951.bin
1ab28c9a17d71ec9195c9e814c293b0b1e833c958abf6bd6c87c387a88c59bd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23951 5544 bytes
font_01_sfnt_off00024c19.bin
5139c9b523749ae7c068bd951bdd6eba392d82f1755c7574a3218a56704322e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24C19 10444 bytes

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