Malicious PDF — malware analysis report

Static analysis result for SHA-256 c595e2e62b917251…

MALICIOUS

PDF

79.9 KB Created: 2021-03-04 22:41:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9b74a78d7d347ceae34a191057914b1d SHA-1: 863a81f0d06150c7c5c6b02b14d3efcabf9d1da0 SHA-256: c595e2e62b9172510c9d4e61bcb1cb413c8a6d0a24e435f2ce970f55294f1d7e
126 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains, many of which are configured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs point to suspicious domains, suggesting the document is designed to redirect users to malicious sites.

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://gimoguvi.ru/strik?utm_term=casio+g-shock+mrg-g1000d-1a PDF link annotation
    • https://cdn.sqhk.co/wumidimux/gfXbSEt/mx_player_android_box.pdfIn PDF document text
    • http://xefopuro.mypressonline.com/motorola_verve_buds_110_price_in_pakistan.pdfIn PDF document text
    • http://mamefumiwuto.mywebcommunity.org/who_does_mollie_symbolize_in_animal_farm.pdfIn PDF document text
    • http://baderezu.scienceontheweb.net/74549827942.pdfIn PDF document text
    • http://xoxuvajes.mywebcommunity.org/casio_illuminator_wrist_watch_price_in_nigeria.pdfIn PDF document text
    • http://xelibirujegid.mywebcommunity.org/how_to_set_sharp_atomic_clock_spc932.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/wamas.pdfIn PDF document text
    • http://tajuliwelofiti.medianewsonline.com/65506513205.pdfIn PDF document text
    • http://netopodimamo.mywebcommunity.org/uniden_um380_replacement_parts.pdfIn PDF document text
    • http://goligofalu.medianewsonline.com/matematica_financiera_valor_presente_ejercicios_resueltos.pdfIn PDF document text
    • https://cdn.sqhk.co/guxuboru/KgggXnW/party._io_game_download_for_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lofese/busybox_x_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/form_6a_eviction_notice_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/543c2f0b-e1cf-4d9b-bdcf-71220dcf0d09/chi_health_council_bluffs_broadway.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d4a8d2c-5695-424d-a2d6-b7dac15922a5/delojalageju.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/blk_super_speciality_hospital_full_form.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF81 5116 bytes
SHA-256: cfac63c1d8feba22ff8a2e6895312d7e92002d3d124b0718ff57c448fd47e018
font_01_sfnt_off000100e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E2 10440 bytes
SHA-256: 018537695d28c7c10f34d248058703818f541a4491ae496565a6f51489d6eb43
font_02_sfnt_off000124aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AA 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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