Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d204f949b97b784…

MALICIOUS

PDF

97.1 KB Created: 2021-03-24 21:14:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d5561b36a4ef01e726d12dad06464afa SHA-1: 45046fb06e58596be21e09cb4764484348881960 SHA-256: 5d204f949b97b784521cb159fc6ba104709ad7b9e8d74e53f51f53990c2c1c45
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, indicating it functions as a link farm. The primary external URL, https://lozipotod.ru/wix?keyword=should+the+electoral+college+be+abolished+answer+key, suggests a lure related to a search query. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution via the linked content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/wix?keyword=should+the+electoral+college+be+abolished+answer+key PDF link annotation
    • https://cdn.sqhk.co/nufopusifa/gTfjaif/oneplus_gallery_update_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/dexizajifu/bXjhoJp/clix_build_websites_publish_for_free.pdfIn PDF document text
    • https://cdn.sqhk.co/pevejotomoma/QgeLXie/55385162416.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://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_6d99430a0cf244fca1b877fa24872786.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/38383792817.pdfIn PDF document text
    • https://s3.amazonaws.com/jugobimuraje/what_is_passive_fire_control.pdfIn PDF document text
    • http://fepetixapokurob.myartsonline.com/56969887807.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25f88401-6de5-4113-aece-2352de38b1b2/risibuxebulo.pdfIn PDF document text
    • https://46d16763-6c5f-4e19-aa2c-3f4071fcbec2.filesusr.com/ugd/26f730_15ba026bff4d411789b362d799756bee.pdf?index=trueIn PDF document text
    • https://b3e719cc-30df-460f-a5cd-d2fa480fcfac.filesusr.com/ugd/b2b6a5_763cbf047f4e40a8be3d173923b5ca55.pdf?index=trueIn PDF document text
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_0e1b83bb70854365b3844a9e66d8a376.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d09856b9-4809-4254-b4e9-8514e13b30f7/que_hace_un_supervisor_de_produccion_en_una_empresa.pdfIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_35c8fa97822e4f03994109313d7aa3ae.pdf?index=trueIn PDF document text
    • https://1d942ef5-affb-47d8-8f99-70a3d187b733.filesusr.com/ugd/3283b0_52e5da25723440f0873d6f20c322f64f.pdf?index=trueIn PDF document text
    • https://562a32fb-e9c8-4d8f-ac7e-a760da58c396.filesusr.com/ugd/68ec97_2971dcb3b3684377b8976e1c14b5e27e.pdf?index=trueIn PDF document text
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_8379617bc92642bd98a3a439ad5de39d.pdf?index=trueIn PDF document text
    • http://tulajadulixo.myartsonline.com/sony_vrd-mc6_specs.pdfIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_4e6bae421bc54266a194d8c098ad1972.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C33 5584 bytes
SHA-256: dbb34ee8f699967626c9a599cda4c32d83c02f7275c4f2709760b40eab155641
font_01_sfnt_off00013f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F39 12384 bytes
SHA-256: 7d3ab646237c25d3380de44e921fa397316c396a2c597ffd933d85e8cb1c535e
font_02_sfnt_off000168b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168B7 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3