Malicious PDF — malware analysis report

Static analysis result for SHA-256 e466950b6c87a566…

MALICIOUS

PDF

83.3 KB Created: 2021-06-06 18:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c7d82ac9b321775e929baa72ce600c54 SHA-1: 17492a191e4eb004508126bbfc733b1b1ec7be50 SHA-256: e466950b6c87a5668f6278945e70be237b3e253250ace789ba43e714440096a8
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The embedded content appears to be junk data, further supporting the malicious intent of redirecting users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://garglob.ru/pbw?utm_term=what+factors+caused+the+industrial+revolution+to+start+in+europe PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369505/normal_5fdd888478773.pdfIn PDF document text
    • https://tadurefejixuset.weebly.com/uploads/1/3/4/4/134498676/namuguzezoparu.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4409000/normal_60b2aded8c3a5.pdfIn PDF document text
    • https://lumikefobebodas.weebly.com/uploads/1/3/4/3/134324067/322459.pdfIn PDF document text
    • https://jumobagovuv.weebly.com/uploads/1/3/4/6/134697352/fopafikafubekinavidu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414169/normal_6002611b50869.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376088/normal_6000bdd0c03c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426075/normal_605bba8133df2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449392/normal_606d9d4a9ae65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406777/normal_5ff29650e2260.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403127/normal_5fe0e12896604.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c32dd09-6f12-4b8b-b24d-35650c84ffa2/is_mergy_safe.pdfIn PDF document text
    • http://vazufatar.pbworks.com/f/jowizugagojimojajakonasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25cc5696-ee84-4ecf-9c19-e51b49aa24b2/56213823110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dce95993-9e38-45f5-a3a0-5cd51273a1df/mathematical_statistics_with_applications_in_r_3rd_edition.pdfIn PDF document text
    • http://gulisapil.pbworks.com/f/descargar_merengue_clasico_de_los_80s_30_grandes_exitos.pdfIn PDF document text
    • http://tejudafo.pbworks.com/w/file/fetch/144665235/94457060074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/656abdd8-ffd3-4f82-93dd-920b74385879/robin_trocki_muerto_en_vida_real.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68449993-9f49-450a-b87b-1db3b9cac1f2/4058953368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/844a05e9-2ed1-4dfc-a629-9e1653fdfff9/hoover_steamvac_deep_cleaner_dual_brush_action.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ee08ebd-c1bb-445b-8ed8-cc5fb8ce4adb/what_is_the_instrumental_music_of_renaissance_period_brainly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e1ec033-d124-48c2-b2b6-8b9d903e3ffd/66422305578.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_off00010846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10846 5316 bytes
SHA-256: 5dad2c38934dab319e17b45a5a4463a07fd9ff9bc1b68cc91d6e791283e6af26
font_01_sfnt_off00011a6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A6C 10784 bytes
SHA-256: a043753f8c7c86f667cec067e3dd16794118975fef53f71bf75b61be1ecac57d