Malicious PDF — malware analysis report

Static analysis result for SHA-256 066fb7a924c8f601…

MALICIOUS

PDF

74.7 KB Created: 2021-03-19 16:06:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fb421ef49d81b58e71f68ad3909123a1 SHA-1: 72956171055236e8bdfe96846c75e4b47f51412e SHA-256: 066fb7a924c8f601b02896b976e7ea67b16cedd3d6fafbec3b799f828d0935ae
186 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The primary URL, 'https://jottigo.ru/strik?utm_term=how+to+put+together+graco+pack+n+play+changing+table', is presented as a guide but likely serves as a lure for phishing or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/strik?utm_term=how+to+put+together+graco+pack+n+play+changing+table PDF link annotation
    • https://bopevifobomamak.weebly.com/uploads/1/3/0/8/130814579/finotoroberasimib.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/ficRice/98192460136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497082/normal_5fd991b48228a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382193/normal_602881a3cd591.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446289/normal_5fda19ea47c1c.pdfIn PDF document text
    • https://cdn.sqhk.co/basunemavut/XiFpWji/boxing_weight_loss_transformation.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/26pPjgF/85335387135.pdfIn PDF document text
    • https://cdn.sqhk.co/kanedufopuma/gjuzjed/xezaledoxidofe.pdfIn PDF document text
    • http://napowojeba.medianewsonline.com/can_cricut_expression_2_cut_vinyl.pdfIn PDF document text
    • http://midakurapujif.mypressonline.com/national_geographic_magazine_october_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495399/normal_6053f05ad7e6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502248/normal_603ac67c6b375.pdfIn PDF document text
    • http://futigovu.scienceontheweb.net/key_concepts_in_critical_social_theory.pdfIn PDF document text
    • https://kerimoseb.weebly.com/uploads/1/3/5/2/135299904/moranixuporat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_6022a541e4fd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418170/normal_6034001acace5.pdfIn PDF document text
    • https://xuvelufuxilo.weebly.com/uploads/1/3/5/3/135387868/5006234.pdfIn PDF document text
    • http://nosixavol.sportsontheweb.net/19653692143.pdfIn PDF document text
    • https://cdn.sqhk.co/lasetipulos/cghfhgy/ballerina_movie_music.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://uploads.strikinglycdn.com/files/fa07fac5-d3f5-482f-a9b6-939fd314a6f3/alain_badiou_books_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a078c3dd-f0fa-4f8c-9a05-ec5f2eaf80ef/how_do_you_reset_a_braun_thermoscan.pdfIn PDF document text
    • http://namakanexir.atwebpages.com/pelonud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccf61ea6-9b66-43de-bca8-7b799ac76057/latitude_e7450_specs_i5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd531a57-98e0-4912-b2d9-ae524ac2c1ca/jidobip.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_off0000d718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD718 5260 bytes
SHA-256: f5763455b809c6d8b4cdd8a5b795332e487538ef489cf941f2e9ba4d8bf10425
font_01_sfnt_off0000e90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90B 10552 bytes
SHA-256: 9b5a1277b4aef200a7c3494f1523b296898e362b59c222b80070196bec9c7134
font_02_sfnt_off00010cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDD 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f