Malicious PDF — malware analysis report

Static analysis result for SHA-256 c81525efd55e9f68…

MALICIOUS

PDF

81.9 KB Created: 2021-03-24 05:49:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 747b99e978f3d0495e565548c51f63a6 SHA-1: 009ad8df72b4394b80245a1db514c4c0655b91ca SHA-256: c81525efd55e9f681a8a543653bf0f021359acb94c10cbe4757f2836188b6242
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. ClamAV detection and ML classification strongly suggest this PDF is malicious, likely a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to lead users to compromised or malicious websites.

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/wix?keyword=plebeians+and+patricians+activities PDF link annotation
    • http://xufulop.iblogger.org/test_di_ammissione_bocconi.pdfIn PDF document text
    • http://difipalilif.scienceontheweb.net/52269308245.pdfIn PDF document text
    • https://tusatetop.weebly.com/uploads/1/3/1/4/131408029/tetun-xexuselufe-wizajafudu-disasosejas.pdfIn PDF document text
    • http://nefozufovi.scienceontheweb.net/pesibazajukuz.pdfIn PDF document text
    • http://dizititakozazi.mywebcommunity.org/59523870478.pdfIn PDF document text
    • http://xebiniseba.mygamesonline.org/sap_jantung_koroner.pdfIn PDF document text
    • https://girodexusaxemo.weebly.com/uploads/1/3/5/3/135388358/lapenonivorewasabusa.pdfIn PDF document text
    • https://waxebusesu.weebly.com/uploads/1/3/4/7/134770319/36317580.pdfIn PDF document text
    • http://pezejij.mygamesonline.org/kizuwedidanaxujefona.pdfIn PDF document text
    • https://limorevoxa.weebly.com/uploads/1/3/4/6/134611026/2c07983.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuwedilejom.myartsonline.com/20003083179.pdfIn PDF document text
    • http://ralirajuz.atwebpages.com/ronco_showtime_rotisserie_4000_white.pdfIn PDF document text
    • http://dibogazosenu.epizy.com/biology_books_free_download_in_file.pdfIn PDF document text
    • http://torejejowomu.myartsonline.com/vuwonamerofaroposexizeri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c37da3b-841b-49d2-8891-39ac1befa19d/how_to_set_smart_electrician_indoor_timer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7500025-514e-4f13-a42d-500150beda86/bulevijudewabalubepof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1216af7f-8d8b-4dcd-85eb-e99f195830e8/59139445408.pdfIn PDF document text
    • http://tefetuzuzip.myartsonline.com/spss_data_analysis_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/253a054e-0fa7-4655-ba91-03561c297b5a/26115013154.pdfIn PDF document text
    • http://damowepoko.myartsonline.com/definition_de_l_argumentation.pdfIn PDF document text
    • http://xekaguviratavu.epizy.com/strategic_retail_marketing.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_off000104d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D9 5268 bytes
SHA-256: 2d160b1084e68f0ab8bf727678b694cb0830cf520c95e8597e36daebb5fb72e1
font_01_sfnt_off000116cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116CB 10456 bytes
SHA-256: 97ee5e6a7614ca4bd0f614285e835f501f5afe8d2c3df4a7b71867aa900b0c8b

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