Malicious PDF — malware analysis report

Static analysis result for SHA-256 92f5db077873c87a…

MALICIOUS

PDF

79.5 KB Created: 2021-05-12 14:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 74276611bf8c73cfa8e56f6362e7b36e SHA-1: d40faa26d9b213468d30fd5f4209d446f89914a2 SHA-256: 92f5db077873c87a9b33d7ded4acebb071b129decbbc0399bcf8a16f677f0398
126 Risk Score

Malware Insights

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

The PDF file contains a high number of embedded URLs, many of which point to disposable hosting and are used in a link farm. The primary URL, 'https://baarspo.ru/strik?utm_term=divine+mercy+chaplet+ewtn+live', is presented in a way that suggests it is a search result, likely to trick users into clicking it. ClamAV detection and ML classification strongly indicate malicious intent, consistent with phishing or malware distribution.

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://baarspo.ru/strik?utm_term=divine+mercy+chaplet+ewtn+live PDF link annotation
    • http://walabowagem.iblogger.org/nolusol.pdfIn PDF document text
    • http://kenaxifinot.22web.org/fofedilamevivebirebus.pdfIn PDF document text
    • http://vukagife.iblogger.org/barclaycard_ppi_claim_form.pdfIn PDF document text
    • http://gigazukiwizave.22web.org/15643187706.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/jolunenafobuw/what_is_the_difference_between_the_city_mini_double_and_gt.pdfIn PDF document text
    • http://pewavifasovifuz.epizy.com/2016_ford_f-250_owners_manual.pdfIn PDF document text
    • http://baruneridetaju.epizy.com/azan_ke_baad_ki_dua_download.pdfIn PDF document text
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_7ac744923806475fac62b97943860883.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/amide_formation_from_acid_chloride.pdfIn PDF document text
    • https://fa886832-b9e3-4ce5-a98c-97da2614721f.filesusr.com/ugd/9f8050_f7a4ba0cf7954b3c8f6f500e8e39d666.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc4b7c18-4772-4092-b4ad-3403c0e74fca/how_much_does_piping_cost.pdfIn PDF document text
    • https://54e283d8-6946-47af-b6e3-c78582312647.filesusr.com/ugd/22cd47_b4f71b120e5547c9a8c5d5a469a0dbfb.pdf?index=trueIn PDF document text
    • http://riperumegebi.epizy.com/appsc_group_2_previous_papers_with_answers_in_telugu.pdfIn PDF document text
    • http://tefozofikiduja.epizy.com/cashmere_cat_miss_you_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ca778b0-5fc9-49f7-9a13-905d2e763260/27248936345.pdfIn PDF document text
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_aa6b06a3ce784779b4e749c600eb174d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sazomo/13227751855.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/049eaeac-e705-468f-960a-8a4c08eeb6bc/what_is_integrity_in_professional_ethics.pdfIn PDF document text
    • http://zejajedep.rf.gd/98911349276.pdfIn PDF document text
    • http://puguvapalovuzub.rf.gd/zalorobidebulomigizirewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/591e38c4-5564-4587-bc66-bdd80ce88833/crosman_66_powermaster_rear_sight.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_off0000fb31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB31 5248 bytes
SHA-256: efe9b6802d462adf09dd422a246bc3531f496195a59876ef9280f53dcbc9747c
font_01_sfnt_off00010d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D02 10440 bytes
SHA-256: c5b0cde8600d096081101f9908148db43a903070be0b4c63006f7ba13512ea7f

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