Malicious PDF — malware analysis report

Static analysis result for SHA-256 a166b3b4bad6c3bb…

MALICIOUS

PDF

69.6 KB Created: 2021-03-19 18:50:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39b8f991577f4349b273096b687d70f9 SHA-1: 65d6a8758c5263fe64a63839b17dab2fe6ecd83e SHA-256: a166b3b4bad6c3bbc0bc05fe88baecdb3c25cc473956c37bae7b0a82c3c1cbe5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/123?utm_term=carothers+performance+knives+edc
    • http://pizidojokinesa.66ghz.com/41272956910.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/besafefaf/osrs_bandos_guide.pdf
    • http://mabazekow.epizy.com/exerccios_resolvidos_de_distribuio_binomial.pdf
    • https://s3.amazonaws.com/fajeloninesitel/gadfly_suite_sheet_music.pdf
    • http://ravesezubepad.epizy.com/lideta.pdf
    • http://ziwunoli.epizy.com/63617567329.pdf
    • https://uploads.strikinglycdn.com/files/43be7d48-e818-4f6c-b093-f89cc9ee799b/mibamepugibejokibojeruvi.pdf
    • http://wepukuxazej.rf.gd/cisco_aironet_3600_configuration_guide.pdf
    • http://rokutore.rf.gd/characteristics_of_quality_information.pdf
    • https://uploads.strikinglycdn.com/files/7c609053-e3ec-4647-8a7a-5096bdaff29f/windows_server_2012_r2_iso_download.pdf
    • http://sutejapikomi.epizy.com/reflexive_pronouns_each_other_one_another_exercises.pdf
    • http://xujekodade.epizy.com/77674495333.pdf
    • https://uploads.strikinglycdn.com/files/c5fe6582-7a8f-4cf4-96cf-c0f70e10e6c0/listen_the_art_of_effective_communication.pdf
    • http://pibasas.epizy.com/jufajujeloti.pdf
    • https://s3.amazonaws.com/faduxodiwo/cancionero_latino_para_guitarra.pdf
    • http://sedoguzod.rf.gd/omers_annual_report_2011.pdf
    • http://joxufomuxofepa.rf.gd/88817609445.pdf
    • http://ruzupaxenerod.epizy.com/breast_cancer_patient_education.pdf
    • http://numekup.epizy.com/24354241924.pdf
    • http://vunolipatebaw.rf.gd/residential_rental_agreement_florida_template.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce04.bin
78ada7f655f832975cf94dbd0179cdea69a30063767b5a80ad747de17fb3c050		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE04 5392 bytes
font_01_sfnt_off0000e033.bin
0e7578fddcb001b7802c3c436c7a714521abdb9e58ec5327844d4e01fdc48db5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE033 11588 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.