Malicious PDF — malware analysis report

Static analysis result for SHA-256 04790f743c16d930…

MALICIOUS

PDF

86.5 KB Created: 2021-02-28 02:44:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: e55fa10f3850ce22b9f20374f976d590 SHA-1: 9b65c391d65b3fa20964670e9f5b6632149057b9 SHA-256: 04790f743c16d930b699d55bb320a2d53d093f8f0047a5a1a1c08ec1e42b6d9f
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting services and are designed as link farms. One prominent URL, 'https://mezovuduw.ru/strik?utm_term=honda+generator+shop+near+me', is presented in a way that mimics search results, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://mezovuduw.ru/strik?utm_term=honda+generator+shop+near+me PDF link annotation
    • https://maposege.weebly.com/uploads/1/3/1/3/131378999/naratigifuwagax_sirosidaw_pofaziwador.pdfIn PDF document text
    • https://menesifewo.weebly.com/uploads/1/3/0/8/130814293/b79c5c5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378621/normal_5fe31562230ce.pdfIn PDF document text
    • https://cdn.sqhk.co/sowojusawepu/hahfRgd/nakexe.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/27273585117.pdfIn PDF document text
    • https://belexikezetuvom.weebly.com/uploads/1/3/0/7/130775063/4912291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371495/normal_601306892c3ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459028/normal_5fdc6162566ee.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/hfciejb/xevim.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/idMQddw/best_gaming_laptop_black_friday_2020.pdfIn PDF document text
    • https://kiniwotonupit.weebly.com/uploads/1/3/0/7/130776343/e9f46a58a02.pdfIn PDF document text
    • http://vuwefedope.sportsontheweb.net/25518919136.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sojufuka.atwebpages.com/raymond_pallet_jack_owners_manual.pdfIn PDF document text
    • http://kaporeko.rf.gd/pedasojotuzasarikozunoni.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/82533493306.pdfIn PDF document text
    • http://nibedob.rf.gd/cambridge_synonyms_and_antonyms_dictionary.pdfIn PDF document text
    • http://tafiwepamubov.atwebpages.com/do_the_work_steven_pressfield_audiobook_free.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_off000116de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116DE 5304 bytes
SHA-256: c4f45dd54a611b7497ff3f4a7ee92bfd9cf45678bee498101eb730baf519d400
font_01_sfnt_off000128bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128BC 10532 bytes
SHA-256: b0e3f11470e30174fd6a3ef56f566e54e6ac4fc0d3cb8c412a63e6d0d832dbd9

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