Malicious PDF — malware analysis report

Static analysis result for SHA-256 b63566008b771e2b…

MALICIOUS

PDF

98.4 KB Created: 2021-04-30 14:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5bf1069ac6f0f53f40bc48d2cbcd9f5c SHA-1: ec6b95be7946d02127ffaf49d7bdebfa1da12496 SHA-256: b63566008b771e2becab97e418682ecd7f7405657786eea0334766a4e4a4e9e4
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'ponafet.ru', which is likely used to host malicious content or redirect users to phishing sites. The ML classifier also strongly indicates maliciousness, supporting the phishing and potential malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://ponafet.ru/strik?utm_term=harrison%2527s+internal+medicine+citation PDF link annotation
    • http://helplnstagram-confirm.com/208962928410nmyc.pdfIn PDF document text
    • https://cdn.sqhk.co/pevelefotuve/VeJgdC8/godorekomeje.pdfIn PDF document text
    • http://load-bcp.com/felujafitu0187p.pdfIn PDF document text
    • http://copriyghtconfirmed.com/porter_cable_c2002_review6kwj6.pdfIn PDF document text
    • http://sanezukevuzav.iblogger.org/windows_10_enterprise_iso_1709.pdfIn PDF document text
    • https://cdn.sqhk.co/norowitidot/JpIjfia/41151414252.pdfIn PDF document text
    • https://cdn.sqhk.co/sebuwemid/jcgdwha/shotgun_microphone_for_canon_camcorder.pdfIn PDF document text
    • http://banquepopulaire-fr.org/bamopexikigupcbff.pdfIn PDF document text
    • https://cdn.sqhk.co/tamejenonisi/gcvigWz/princess_rapunzel_dress_up_dresses.pdfIn PDF document text
    • http://instapriz24.site/61853173735zwjge.pdfIn PDF document text
    • https://cdn.sqhk.co/sodelaranu/fQgjjhA/story_saver_for_instagram_status_ig_downloader_mod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/liguwubore/how_hot_is_the_burger_king_spicy_chicken_sandwich.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/linear_permutation_problems_with_solutions_and_answers.pdfIn PDF document text
    • http://zapurokorilagar.rf.gd/vuzisumum.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/fedagajonevuburatoxuwub.pdfIn PDF document text
    • http://posawutuz.rf.gd/dofaden.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/gakiwezusoxoradidumemojo.pdfIn PDF document text
    • http://sipujajawe.epizy.com/68633821850.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/tokyo_ghoul_mask_designs.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/82318104044.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/63028038140.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_off000145a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145A4 5080 bytes
SHA-256: 9cfc0654353eb9b55f02bc7b16e665bfa6039f6e61385185cfa980b9717e7492
font_01_sfnt_off000156d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156D8 11164 bytes
SHA-256: 6ef83b03a15eae38a7dec4e87afa3c799072af9be684969f89b9fe2287727982

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