Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b62023e3ad9aa1…

MALICIOUS

PDF

79.1 KB Created: 2021-04-20 11:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 4676738fa27cc56db3d212851187bc9a SHA-1: 8092385b4915ae9fb07d754ce3aadeec86be0095 SHA-256: 68b62023e3ad9aa127c80d21d88225b05948078061ae6f19403bcae61cafaeb7
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL leading to a suspected phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

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://pelibifir.ru/strik?utm_term=what+does+nlt+bible+mean PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462352/normal_60247db063239.pdfIn PDF document text
    • https://cdn.sqhk.co/govazofaj/Dhe4id1/simulife_life_simulator_games_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/muxuzoxipopa/jflhdhf/bodekepebo.pdfIn PDF document text
    • https://cdn.sqhk.co/rolekixawute/mJzJjer/free_antivirus_smadav_pc.pdfIn PDF document text
    • http://sozetil.66ghz.com/fox_sports_asia_tv_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisezepemu/cyJOl0L/4295340054.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450628/normal_5fcb2ccb28f5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497369/normal_60641333640b8.pdfIn PDF document text
    • https://cdn.sqhk.co/bukevexej/Fhbgejg/sonic_level_maker_apk.pdfIn PDF document text
    • http://www.zondervanbibles.com/trIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/titisuvoterekekufelamujim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1211759-1fc1-4464-b007-290a4d6db73a/purple_cow_menu_kingsport.pdfIn PDF document text
    • https://21036261-01f9-4725-a342-2b8b08d10099.filesusr.com/ugd/d0cbc4_a63f18d35f3a44c6bc9fc4ddfb84d84d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/kudet.pdfIn PDF document text
    • https://4c6480a9-ccec-4c20-853c-cc48681c44ad.filesusr.com/ugd/935adc_6272513a24d143f781853b992a83f687.pdf?index=trueIn PDF document text
    • http://lesuzikabe.epizy.com/kulokexadirepota.pdfIn PDF document text
    • http://gavokalofo.epizy.com/78680735242.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22a01ba7-039d-4c21-ab7e-3a0edd4dd954/lactancia_materna_exclusiva_y_estreimiento.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/kapagoxonevevofolivo.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/fire_emblem_heroes_starter_guide.pdfIn PDF document text
    • https://b6c9d0de-81a1-4db9-ab7d-8a95af9e63d6.filesusr.com/ugd/b28ae2_82a1d9d5b0814e76a121eea252284de2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cfc5ef9-322b-4fef-9cd1-061a3a9214fe/xabevujowamosibologirani.pdfIn PDF document text
    • https://12350a4d-732a-4148-85a7-4fa27f2a77ec.filesusr.com/ugd/17beed_51bdbf63616f4bbb8802d165e408a9ad.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_off0000f8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F9 5120 bytes
SHA-256: b1ab79e01bd782c3abfa148edc3280b85e4ecbacd7f2371145df7d133fc0d65b
font_01_sfnt_off00010a47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A47 10928 bytes
SHA-256: d1d17646881b9610de93d40fc41238f9a1f971a7a561113075f82b6a79ad1170

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