Malicious PDF — malware analysis report

Static analysis result for SHA-256 495a2fb20da0c194…

MALICIOUS

PDF

74.0 KB Created: 2021-02-12 22:15:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: de72ba08e45c28e41f5bbcb7b5d3aef1 SHA-1: 96cec0a731727d2850672282f8eb048997841484 SHA-256: 495a2fb20da0c1944952148acd70059836e5bef3c500f2f8ca813abd0ba45e18
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains a large number of external links, with one pointing to 'http://dalumawinalejat.epizy.com/meroxugavalosutuzi.pdf', suggesting a link farm or redirection mechanism. The embedded URL 'https://seumenha.ru/123?utm_term=purpose+driven+day+16' further supports the phishing or malware distribution vector.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/123?utm_term=purpose+driven+day+16 PDF link annotation
    • https://talidifixuj.weebly.com/uploads/1/3/5/3/135390844/9526126.pdfIn PDF document text
    • https://bamebifubakuta.weebly.com/uploads/1/3/1/4/131408159/cf26ef1ad1323.pdfIn PDF document text
    • https://ruxevikupasej.weebly.com/uploads/1/3/4/6/134663562/5c887ac.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanekoxo/8vifbwC/live_stream_debate_tonight_fox_news.pdfIn PDF document text
    • https://gadonivoxe.weebly.com/uploads/1/3/5/3/135331758/pimumulogukatob.pdfIn PDF document text
    • https://javesobasi.weebly.com/uploads/1/3/4/7/134736097/73f99a.pdfIn PDF document text
    • https://poxejiwexoji.weebly.com/uploads/1/3/4/6/134639112/kusalem.pdfIn PDF document text
    • http://xadixul.66ghz.com/itunes_for_laptop_windows.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dalumawinalejat.epizy.com/meroxugavalosutuzi.pdfIn PDF document text
    • http://tivemuga.rf.gd/mezubuwamoxuzuxoxawodoro.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/automated_logic_thermostat_rs_pro_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/ms_excel_grocery_list_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/zovulutevidupawizokupow.pdfIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/concept_of_economic_geography.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/chamakam_in_kannada.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/minnie_mouse_birthday_card_template.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/basic_circuit_diagram_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/wamaxavogifiboguwamor.pdfIn PDF document text
    • http://bikikifuxax.epizy.com/95590962248.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_off0000e51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51F 5288 bytes
SHA-256: 38df4b91f1afa51a3c088edc95e60664c8ab588a3112252b955142a88e999e24
font_01_sfnt_off0000f73f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73F 10792 bytes
SHA-256: 6e0a86be2509d309bb353923d3eee2db7495d7aa880377b84e748dfbf4ad212c

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