Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c2b47a4953519f4…

MALICIOUS

PDF

184.1 KB Created: 2021-03-17 16:04:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 6bc8aea9323083c5da77663d7b59b817 SHA-1: ca603f828b4fbfecd87f29d4f13194631065ffc3 SHA-256: 1c2b47a4953519f46410e9d47869d4a28d62eb0b4a5b822b28d405e833abe3b9
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with one specifically pointing to 'kuzutuzo.ru/award', suggesting a lure to a phishing or malware distribution site. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further support the conclusion that this document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/award?keyword=economie+francaise+pdf PDF link annotation
    • http://tavalidoxifur.22web.org/angina_symptoms.pdfIn PDF document text
    • https://pajobujanij.weebly.com/uploads/1/3/1/6/131606923/395132.pdfIn PDF document text
    • https://webemibas.weebly.com/uploads/1/3/5/2/135298215/bamadubijen.pdfIn PDF document text
    • https://kasasifu.weebly.com/uploads/1/3/4/6/134697732/pomonajudamuxur.pdfIn PDF document text
    • https://mapetafuje.weebly.com/uploads/1/3/2/7/132741207/cf41da34753ae.pdfIn PDF document text
    • https://batezumepew.weebly.com/uploads/1/3/4/4/134479003/wevizasa-biperepaniru-binub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://eb40363d-1d1f-4170-a897-f23f0f433116.filesusr.com/ugd/2a1429_fabb5b6aba6e48619091b2be0da71b58.pdf?index=trueIn PDF document text
    • http://puteroxono.epizy.com/xezojofexupixot.pdfIn PDF document text
    • http://tebalakafepikob.rf.gd/chuyen_doi_file_sang_jpg_online.pdfIn PDF document text
    • https://e4034479-4ead-418b-af8c-5be8dc72bdbe.filesusr.com/ugd/1e8759_2332b27fb8ba4eb696ce12bc439464b1.pdf?index=trueIn PDF document text
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_d03fd6020c134f8e833adbe0212a957b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/18ac8a20-5888-4647-adbe-4cb8d9c4e13c/kumidupotebusoxav.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/tarisenurikugezareneza.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/84465916746.pdfIn PDF document text
    • https://7095e710-59ac-4d27-8a5a-f3bbcaf65deb.filesusr.com/ugd/418e76_30319fa16a954772ad5ca9af03554bc8.pdf?index=trueIn PDF document text
    • https://e3400ad0-aec1-4e7c-acb2-62555e99d29f.filesusr.com/ugd/165585_98c9a4d368e64f8d90bec6995e5a8a6c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/32c77581-22ea-4d17-bba1-3912fc3aa1a5/dofuluwuwutokole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26f94129-4194-48d3-ab65-1fb0b9388616/pattys_charcoal_drive_in_ap_questions_answers.pdfIn PDF document text
    • http://judutuv.epizy.com/lexile_level_chart_7th_grade.pdfIn PDF document text
    • http://piwugolixero.epizy.com/11263697030.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_off000290da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x290DA 5228 bytes
SHA-256: 0f008ecc423e1be3b5fdd340275e98e256e92f7377b16b261213459003095a4e
font_01_sfnt_off0002a290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A290 14896 bytes
SHA-256: 58fc3f961fb2c97179c0376439bd6b6cda9d4bb2fcb6c0f184052c1499403440

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