Malicious PDF — malware analysis report

Static analysis result for SHA-256 0827b8372e8824f6…

MALICIOUS

PDF

86.6 KB Created: 2021-05-16 02:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1c31b9e30d18385a5c3554204534787 SHA-1: 578f1f235ee61a76fbd34567c742ce30832347f2 SHA-256: 0827b8372e8824f6cf7ca9511835ed735b97e52454edd78fdddaed00841e52f7
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to exploit vulnerabilities or trick the user into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=how+to+respond+to+a+good+review+sample
    • https://wipowoniwosixad.weebly.com/uploads/1/3/0/7/130740259/kibikuwotufubo_gejude_lepuwunom_sakilan.pdf
    • http://xifadezuzurap.medianewsonline.com/8693518632.pdf
    • https://cdn.sqhk.co/zeponaba/Uial7nU/17023058853.pdf
    • https://zapufotipo.weebly.com/uploads/1/3/2/7/132740892/famomegor.pdf
    • http://civiliscmq.online/how_to_make_a_simple_dimple_with_cardboard8mz86.pdf
    • https://cdn.sqhk.co/noxisoture/sDRhggg/bajesizezafe.pdf
    • https://cdn-cms.f-static.net/uploads/4407989/normal_6054196acd60b.pdf
    • https://cdn.sqhk.co/mixekuwuvo/YLJhfpw/madoludumuwagusaza.pdf
    • https://cdn-cms.f-static.net/uploads/4407060/normal_602c972a12a72.pdf
    • https://sukanoxe.weebly.com/uploads/1/3/1/4/131453950/lefido.pdf
    • https://cdn-cms.f-static.net/uploads/4469145/normal_604dea357b521.pdf
    • https://static.s123-cdn-static.com/uploads/4426819/normal_6006f9a8157bb.pdf
    • http://idealicaitalia-ufficiale.site/nekedujusosu71la4.pdf
    • https://cdn.sqhk.co/kagixepo/4o5jidg/amsterdam_smart_citizens_lab.pdf
    • https://cdn.sqhk.co/lojulifuvuxu/ih1ijbz/flip_book_html_template_free.pdf
    • http://jidudilubad.mygamesonline.org/8001884574.pdf
    • http://shopeuro.pro/souffleuse_honda_hs828_specs0dhsa.pdf
    • https://petuxomurekag.weebly.com/uploads/1/3/0/8/130874153/gitigoral.pdf
    • http://tatuxuvoziparu.mywebcommunity.org/alimentos_y_bebidas_conalep_magdalena_contreras.pdf
    • http://instgramcopyrightdispute.com/warcraft_3_reforged_reviewl95w9.pdf
    • https://static.s123-cdn-static.com/uploads/4464056/normal_5fcf405cbe326.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pizuzol.onlinewebshop.net/nenijulexisegujevulular.pdf
    • https://uploads.strikinglycdn.com/files/acb50d30-9fa3-48a6-8ac9-2656a47a15e5/john_henrik_clarke_book_list.pdf
    • https://uploads.strikinglycdn.com/files/62365637-8537-4581-ad0a-b647d3afc6df/punikugezigaxexamag.pdf
    • https://uploads.strikinglycdn.com/files/0b140a0a-f32f-4807-8d11-22d5a833fcde/limijoridevir.pdf
    • 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_off000114a1.bin
f94e2d73e5620c6cdd3a4e489f6680a8950a777c4b2baceea9ffe5221d8667d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114A1 5392 bytes
font_01_sfnt_off000126f6.bin
5b219a6896321ec5e5471d85ac6aba6347e21262c1b6b7610f0c418289812c0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126F6 11064 bytes

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