Malicious PDF — malware analysis report

Static analysis result for SHA-256 69712bb2ff772f3f…

MALICIOUS

PDF

89.9 KB Created: 2021-05-08 18:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 739b8c37b4c166b76b47cdf0ef1941fa SHA-1: 75a35501f6b30988c8931b55dc37cf7921166ecd SHA-256: 69712bb2ff772f3f7a1953c2a3db3122923c136184de2ae44f9f3e6fe58561a0
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of embedded URLs, many of which are associated with link farms and disposable hosting, suggesting a phishing or redirection scheme. The presence of 'utm_term' parameters in some URLs further supports the idea of tracking user interactions with malicious links.

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://leonvi.ru/strik?utm_term=marshall+mg100hdfx+head+and+cab PDF link annotation
    • https://nerapusu.weebly.com/uploads/1/3/1/4/131438180/gupanemina-fakuvijulob.pdfIn PDF document text
    • http://getegenufiduso.66ghz.com/how_to_adjust_the_pressure_on_my_pressure_washer.pdfIn PDF document text
    • http://dimukidiri.iblogger.org/47780019426.pdfIn PDF document text
    • http://pesuzukotejoki.iblogger.org/hidrocortisona_acetato_crema_bp_1_p.pdfIn PDF document text
    • http://nipuxikupiluzep.iblogger.org/6337300440.pdfIn PDF document text
    • http://tuwuradozanava.iblogger.org/wall_street_journal_index_funds.pdfIn PDF document text
    • https://nexitikobimefa.weebly.com/uploads/1/3/0/7/130776699/sazogulove-xadetubiwege.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dotenax.rf.gd/24766035662.pdfIn PDF document text
    • http://luxaneguwes.rf.gd/tupiwinamovu.pdfIn PDF document text
    • https://52aa71f3-9574-4e96-898b-bb16aa893b2c.filesusr.com/ugd/b13a71_d33189821d124b95a157d61820e7db7c.pdf?index=trueIn PDF document text
    • https://e6c529cc-411f-4195-b5ea-7b5fd081490a.filesusr.com/ugd/b7ab08_2e9f8a923b3241f88ddade76789023c9.pdf?index=trueIn PDF document text
    • http://gifixutazopoja.epizy.com/72948397425.pdfIn PDF document text
    • http://fekovip.rf.gd/caracteristicas_del_estudio_descriptivo.pdfIn PDF document text
    • http://getetir.epizy.com/hcv_test_report.pdfIn PDF document text
    • http://josikilemasupi.rf.gd/gubodef.pdfIn PDF document text
    • http://zikenonuto.epizy.com/kujofefekorifaniwajalad.pdfIn PDF document text
    • https://1c92f6d8-19eb-429c-9239-1cf6be91372f.filesusr.com/ugd/cc1a03_78e86b22db4a4446b444d3be64629fd1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a040ec84-a469-4665-af09-21c9f11efb3c/sexafududedujaxel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e33653af-7209-4297-a390-c99693ceb5a7/how_to_demonstrate_cultural_safety_in_the_workplace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a578538-b7a7-4111-8d79-5118b33b3b4f/sifamelipurizalolix.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_off00011cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC3 5844 bytes
SHA-256: 90f28e3cc383ab8f9918cc9ce80d9380a040a8bcab6a023f936b59095ab07f4c
font_01_sfnt_off0001308e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1308E 12364 bytes
SHA-256: 1b8cd45a4ae8464c331978793f62935e3a4bb1f2a5b605ea8c81ee2dc81f818f

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