Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c4f2c3be9861d2d…

MALICIOUS

PDF

89.8 KB Created: 2021-04-18 20:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7d3d97ebc1b558043ca6e959248f4318 SHA-1: 222912d9c2b215de38008c23eeff1112e66e821a SHA-256: 0c4f2c3be9861d2da2137f0e7ea6952bfc5603d3048eb07b56854dee5498c598
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with a primary focus on `https://soxebez.ru/strik?utm_term=ouku+double+din+manual`, suggesting it's designed to redirect users to a potentially harmful site. The PDF structure and the presence of embedded URLs point towards a phishing or malware distribution campaign.

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://soxebez.ru/strik?utm_term=ouku+double+din+manual PDF link annotation
    • http://labiosdewonda.com/zegeti41p0s.pdfIn PDF document text
    • http://trastenmyqort.online/33755136553nnu48.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/jbIjeN9/saredafonavegoveragoza.pdfIn PDF document text
    • http://tricitysikhs.com/togujabezatemugapojukvfob4.pdfIn PDF document text
    • http://josumewemuzob.getenjoyment.net/manfaat_binahong.pdfIn PDF document text
    • https://cdn.sqhk.co/xonumizeno/OEgggdq/koxelevumalanimagemavaf.pdfIn PDF document text
    • http://graatorama.space/how_to_remove_control_lock_on_whirlpool_dishwashere53a0.pdfIn PDF document text
    • http://linorusani.iblogger.org/elisa_and_marcela_parents_guide.pdfIn PDF document text
    • http://mastera-saydinga.ru/panasonic_microwave_inverter_spare_partsgp9to.pdfIn PDF document text
    • http://7evenrp.ru/57247379452iz8mw.pdfIn PDF document text
    • http://wisitens.online/dadufaxizejapagigomorejibmimp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wimanugobupu.epizy.com/adjectif_qualificatif_ce1_exercices.pdfIn PDF document text
    • https://73e8eba8-f08a-4c12-987a-519a82e171c2.filesusr.com/ugd/19159f_61b8c1169239457fa0ca2171dc9ed2a2.pdf?index=trueIn PDF document text
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_b0e978d90f3345f69fb99213a7865d1a.pdf?index=trueIn PDF document text
    • http://bajekixizosi.myartsonline.com/cambio_climatico_global_causas_y_consecuencias.pdfIn PDF document text
    • http://mafizili.epizy.com/geometric_progression_class_11.pdfIn PDF document text
    • https://e8b83640-91e4-44a0-a69f-c2468797902f.filesusr.com/ugd/ee4a13_2804f4d217ff4ef3af1f5120e496bc50.pdf?index=trueIn PDF document text
    • http://zuputes.atwebpages.com/ruxifexalafodululabizog.pdfIn PDF document text
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_f7cf475841fb4bd8a527b5313e005c22.pdf?index=trueIn PDF document text
    • https://6d706a39-1f93-4f1a-9423-caccf7e65e71.filesusr.com/ugd/69f91f_73f7947e0e844d3ea916fb52fbccd57f.pdf?index=trueIn 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_off00011e21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E21 4928 bytes
SHA-256: b42c5e1cef532e2936cc0ac84f50384f33bac949bcb3fad175a672bdac372c87
font_01_sfnt_off00012ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED1 13424 bytes
SHA-256: 6b64dc10056fc08946fd0cd9b02e1caef80ae267cc71cf677449dce70905a7c4

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