Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1ee272c8a986413…

MALICIOUS

PDF

78.0 KB Created: 2021-06-02 12:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 8385a735ad3334b6c2bce22b292afe6e SHA-1: 2a3cf8b96c19032370dcfc3017e142605740b28f SHA-256: c1ee272c8a9864135d97f76eef56bd0a2e32dcf37424f3a473c98c1745afafda
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and heuristics indicate it is a link farm on disposable hosting, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to casting to a Vizio smart TV, likely a lure to drive traffic to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/123?utm_term=cast+android+screen+to+vizio+smart+tv PDF link annotation
    • https://muxilakenakujud.weebly.com/uploads/1/3/4/0/134012833/dojol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476750/normal_601d52406bea5.pdfIn PDF document text
    • https://bigeriburaline.weebly.com/uploads/1/3/4/3/134334921/9488c7617381a.pdfIn PDF document text
    • https://xuwulusepe.weebly.com/uploads/1/3/5/3/135310973/6055607.pdfIn PDF document text
    • https://gelasinez.weebly.com/uploads/1/3/4/7/134763890/4213150.pdfIn PDF document text
    • https://vebupanulaxufe.weebly.com/uploads/1/3/4/3/134393715/vugazolaki.pdfIn PDF document text
    • https://paniwotipetusu.weebly.com/uploads/1/3/4/6/134614288/kutaviwebi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421061/normal_5ff39cc256dac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366964/normal_6006b07a27da5.pdfIn PDF document text
    • https://xidasosi.weebly.com/uploads/1/3/4/7/134722002/puwugomirix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379377/normal_60683ab98725f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366309/normal_605684850c0e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497697/normal_5ff45e5f458cf.pdfIn PDF document text
    • https://wajirabipuxu.weebly.com/uploads/1/3/0/8/130874591/7939333.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456378/normal_601b3ee6b5c89.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/4ddf5128-5b1b-4921-97ee-bec961c33543/18552222007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/761294cb-5930-4400-9ea0-f0d297e41421/how_much_does_it_cost_to_have_a_psychological_evaluation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37f7f336-05c1-44aa-9c83-35417f25ab73/xasilamiziriziruxela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eab216a-0b89-469a-87df-f5853bb36f00/what_is_the_theme_of_wings_of_fire_the_hidden_kingdom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6027a7d-5236-4881-9bc5-f9705c0e066a/nationalism_in_india_class_10_mcq_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61497862-1dc7-4a06-9fff-e4b5cf80b51a/81518774333.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_off0000f2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AA 5068 bytes
SHA-256: 54d9ee0b4cc927bb1798477feacef2421a72f65f1e8a4c7d1e85b464f1fdafc2
font_01_sfnt_off000103d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D7 11588 bytes
SHA-256: 8da27b3e4b8efbc0a48932092aece23c83f958485fed30a8b10fd9b21f1e88f4

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