Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eacc2f353720000…

MALICIOUS

PDF

67.5 KB Created: 2021-02-20 08:18:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 581672f0cb2cd24ee76806ba19e81c2d SHA-1: a51081c38bb8809f7b35d92d5ace2f9c45c27f5e SHA-256: 3eacc2f3537200008fa7be7b8b17186d30e74f374ae126508a7d97de7a35ba6e
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site for further exploitation.

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://bologen.ru/wix?keyword=lecturas+para+reflexionar+en+familia PDF link annotation
    • http://particuliers-societegenerale.xyz/modifying_comparatives_worksheet84j9v.pdfIn PDF document text
    • http://gosejoligezo.iblogger.org/cyborg_technology_ppt_report.pdfIn PDF document text
    • http://tifetatujuvib.22web.org/pazaruros.pdfIn PDF document text
    • http://allrecipes.pro/12932331117vcwjg.pdfIn PDF document text
    • http://fotobaruti.22web.org/mojonibexu.pdfIn PDF document text
    • http://chambre.xyz/subtraction_with_regrouping_worksheets_2_digit0szy8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xonitobilabi.rf.gd/top_horror_movies_in_tamil.pdfIn PDF document text
    • http://wosaxadef.rf.gd/xazopijafaz.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/comma_splice_test.pdfIn PDF document text
    • http://zugugizifozuwor.epizy.com/journal_of_late_antiquity_submission_guidelines.pdfIn PDF document text
    • http://medojowibapij.epizy.com/81198784203.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/evaluating_logarithmic_functions_worksheet.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_off0000c98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC98A 5168 bytes
SHA-256: 78efcb56f521ef1e7111f4ce313946a05f7c76548f2e1c05531d261d2aa02016
font_01_sfnt_off0000db18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB18 11308 bytes
SHA-256: 1d9d5cc1af4d6823dc438c949378b5c7eadbdb8dedbb91bb06b86f0f1b4490d4

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