Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a7ca0bb21783144…

MALICIOUS

PDF

76.0 KB Created: 2021-03-04 22:32:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c973d1dd7ce237684234ad5c7a99a8bc SHA-1: 74af8b6bcf95e23ac12b9fb21124f4ec6409af99 SHA-256: 9a7ca0bb2178314406d128f9d921e9b94b91fffd4aa2e32f9db4bc1ba01d7124
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though truncated, suggests a lure related to universal remotes, and numerous external URLs are embedded, many of which are hosted on disposable domains or link farms. These URLs likely lead to phishing pages or further malware downloads, consistent with a spearphishing attachment attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://lozipotod.ru/award?keyword=universal+remote+compatible+with+roku+tv PDF link annotation
    • https://cdn.sqhk.co/xagaxubibiz/dRLib1s/walmart_grocery_delivery_in_home.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380531/normal_6037455a77e21.pdfIn PDF document text
    • http://all-gopro.com/wabupozumibatajakodnjpx.pdfIn PDF document text
    • https://retowukiri.weebly.com/uploads/1/3/4/5/134592720/65e471c00596d7.pdfIn PDF document text
    • https://sunitago.weebly.com/uploads/1/3/1/8/131856801/ca76a5.pdfIn PDF document text
    • https://cdn.sqhk.co/puvivefujef/guGnjae/71863094965.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458132/normal_603603dc69d60.pdfIn PDF document text
    • http://motorutovibipe.sportsontheweb.net/small_engine_repair_melbourne_florida.pdfIn PDF document text
    • https://cdn.sqhk.co/mapelimujeku/gheithd/ubisoft_prince_of_persia_escape_room.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450630/normal_5fcab9d745145.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448746/normal_5ff5694f369b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493221/normal_5ffa08704d643.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426557/normal_60339f7d4b2d9.pdfIn PDF document text
    • http://teachost.com/ielts_academic_writing_test_sample_answersudnv0.pdfIn PDF document text
    • https://febefadu.weebly.com/uploads/1/3/1/4/131453100/d1bb3eec4a83.pdfIn PDF document text
    • http://kieverts.xyz/what_is_technical_drawing_all_aboutufv3w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485809/normal_5fd25004a3d46.pdfIn PDF document text
    • https://galujamisone.weebly.com/uploads/1/3/1/8/131871568/5a9b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470825/normal_600ceee1bfeab.pdfIn PDF document text
    • https://bisigategisabuv.weebly.com/uploads/1/3/4/8/134884720/zataxogivapemixi.pdfIn PDF document text
    • http://itwomen.space/75624137345hf7fp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nixomirorubu.myartsonline.com/graphic_design_software_for_mac_full_version.pdfIn PDF document text
    • http://raxajabidadida.onlinewebshop.net/17039843558.pdfIn PDF document text
    • http://kimoviranonaf.onlinewebshop.net/fudge_a_mania_book_study.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_off0000ea3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3F 5520 bytes
SHA-256: fd28b52d0fe666e1ab7a52f3f056cca99e3550fd9f118f49eca779798b5be3e9
font_01_sfnt_off0000fcea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEA 10956 bytes
SHA-256: fa6a6671edce7ea1fcc8894695fec6a2f8dedd1e8ec46061c4c64e068d09d07e

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