Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d424464c2f5a108…

MALICIOUS

PDF

74.0 KB Created: 2021-02-16 12:08:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2acb626b43e7f8dbcf0f9ba33f7693af SHA-1: 286888c11915362ba2c2c435e9fc4d8155dc239b SHA-256: 0d424464c2f5a108af62c4d45db3cb7f6367f2a4fd84dd642369043668c4451d
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a heuristic indicating it is a phishing lure, specifically using an image to redirect users to a URL. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL, https://jacksth.ru/strik?utm_term=resetear+tablet+yuntab+k107, is identified as a redirector likely leading to a phishing or malware download page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jacksth.ru/strik?utm_term=resetear+tablet+yuntab+k107 PDF link annotation
    • http://jalatuxu.iblogger.org/fodezopebo.pdfIn PDF document text
    • http://masimepipet.22web.org/35300602877.pdfIn PDF document text
    • http://selizixid.iblogger.org/46771719505.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tuzamada/amoeba_sisters_multiple_alleles_worksheet_answers.pdfIn PDF document text
    • http://xujogefup.rf.gd/vitapur_water_dispenser_troubleshooting.pdfIn PDF document text
    • http://mevusajilitum.rf.gd/rekonevag.pdfIn PDF document text
    • http://ziwufuv.rf.gd/sort_excel_spreadsheet_by_cell_colour.pdfIn PDF document text
    • http://vetarobafawuk.epizy.com/araba_oyunu_indir_apk_cepde.pdfIn PDF document text
    • http://wixezujixib.epizy.com/65579369299.pdfIn PDF document text
    • http://xagazusapikim.epizy.com/nibigaxe.pdfIn PDF document text
    • http://pikoritefum.epizy.com/23220726191.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/falebiveguzusilivatexik.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/bangla_baul_dj_song.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/33329245547.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/nuxetasidekapox.pdfIn PDF document text
    • http://vekamujibatebig.rf.gd/video_gransazer_episode_10.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/equifax_canada_free_credit_report_phone_number.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_off0000e449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE449 5268 bytes
SHA-256: 1d0f567b7b850e54e25ece5ecae60a5144c8395e0d0f9bdaacfbe64db516d094
font_01_sfnt_off0000f659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF659 10864 bytes
SHA-256: b74f0e89e3fe9544f821f28f64a7006111458fe868fcc1424280a17142401f9a

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