Malicious PDF — malware analysis report

Static analysis result for SHA-256 26995fb9253ab245…

MALICIOUS

PDF

75.0 KB Created: 2021-03-16 07:53:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ff4702275afb1b651ea5cf91be3b52c7 SHA-1: 57f136c7a679327cc862e6079d283ee5105a18a6 SHA-256: 26995fb9253ab2453c69c3f4d801b6f7f8c40c3cb638b3d8d731f335b74cb7ae
126 Risk Score

Malware Insights

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

This PDF file contains an embedded URL that redirects to a suspicious domain, likely for phishing or malware distribution. The PDF itself is structured as a link farm, with numerous external links pointing to various domains, many of which are disposable. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or a trojan.

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://seumenha.ru/strik?utm_term=sears+air+compressor+regulator+parts PDF link annotation
    • https://wafiludelo.weebly.com/uploads/1/3/1/4/131437380/sedinofumowo.pdfIn PDF document text
    • http://dimupure.22web.org/zagepelukufewata.pdfIn PDF document text
    • https://wajuzetixageg.weebly.com/uploads/1/3/0/9/130969085/momujuzemubivarar.pdfIn PDF document text
    • https://cdn.sqhk.co/tijaxasazuwi/hjGiaif/gavogozopesumepizomurotex.pdfIn PDF document text
    • https://zivotawab.weebly.com/uploads/1/3/4/5/134576919/razuban.pdfIn PDF document text
    • http://pizeval.iblogger.org/bezier_surface.pdfIn PDF document text
    • https://cdn.sqhk.co/wetaxawirewu/wFjeqz2/13282234366.pdfIn PDF document text
    • http://zumufaxe.iblogger.org/jebomo.pdfIn PDF document text
    • https://lexizade.weebly.com/uploads/1/3/4/3/134368494/7b3c5a5670137.pdfIn PDF document text
    • http://damomemisogadex.iblogger.org/airworthiness_inspector_manual.pdfIn PDF document text
    • http://nurigoluda.mygamesonline.org/78253534104.pdfIn PDF document text
    • https://titumakusijuvap.weebly.com/uploads/1/3/4/3/134353199/zaridesavubova.pdfIn PDF document text
    • https://wuzitefagoxu.weebly.com/uploads/1/3/1/8/131856046/8512915.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/pevuwarobuvowa/nubepufikinatilojij.pdfIn PDF document text
    • http://rorokepu.atwebpages.com/swot_analysis_google.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/ctasd_reports_confirmed.pdfIn PDF document text
    • http://wofofuzumoju.rf.gd/sandisk_mp3_player_wont_turn_on.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/adivasi_gana_dj_mp4.pdfIn PDF document text
    • http://davofunup.onlinewebshop.net/15329073866.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_off0000e66e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66E 5356 bytes
SHA-256: fa679bfa2bbd587820af7b368aadfbd1aa09543801f8f595b6b7c26318df0a69
font_01_sfnt_off0000f88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88F 11280 bytes
SHA-256: b461d08b12c9a065d03a1c28576b4b40a16d3ed56e78e19103cb3e0ea196ef26

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