Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6c6aa41988b1710…

MALICIOUS

PDF

74.8 KB Created: 2021-03-22 01:00:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1300203ca3048c6c819a87662735aa00 SHA-1: 9755b3638708d6decb3ac121a35beac2fce97f39 SHA-256: f6c6aa41988b17102aa8d71dcf228962ef06639310299cc4a2f76b7d703a5b7a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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=skil+15-amp+7-1%252F4+circular+saw PDF link annotation
    • https://cdn.sqhk.co/fuvazuginu/aykbIhh/vogajawumemefokevifi.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/sword_art_online_episodes_order.pdfIn PDF document text
    • https://cdn.sqhk.co/kibukumivu/gheRjjB/django_template_tags_default.pdfIn PDF document text
    • https://cdn.sqhk.co/jukunobegabe/hjj3qie/bare_knuckle_fighters_london.pdfIn PDF document text
    • http://wivupivipewezap.mygamesonline.org/46731388353.pdfIn PDF document text
    • http://samabev.iblogger.org/lakshmi_stotram_hindi_meaning.pdfIn PDF document text
    • http://risorabakuwurus.22web.org/74914753474.pdfIn PDF document text
    • http://diposiz.iblogger.org/free_creative_cv_templates_microsoft_word.pdfIn PDF document text
    • http://winoxolupuvil.getenjoyment.net/xawobakobowiwopiwo.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/y1igmhe/1658756218.pdfIn PDF document text
    • http://tipaxoj.66ghz.com/free_holiday_party_flyer_template_word.pdfIn PDF document text
    • https://cdn.sqhk.co/vifejoneses/cBG2W4l/vinirenukosivisitikit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sukowinom.rf.gd/add_random_numbers_in_excel_sheet.pdfIn PDF document text
    • https://4dcfe184-cd6c-48f8-9f23-5461c743a1d4.filesusr.com/ugd/cc8533_aad4bef5e1004b88ac4917c09c096f2f.pdf?index=trueIn PDF document text
    • https://72b50e20-f79f-40ca-96b4-24bef83e308f.filesusr.com/ugd/1a1092_4842817b5fef4a3da5095856e24db569.pdf?index=trueIn PDF document text
    • http://dawutanarav.epizy.com/emulsion_polymerisation.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/why_did_the_sky_light_up_last_night.pdfIn PDF document text
    • https://4a39c6c9-989b-4d11-b2d8-cc0becc7f193.filesusr.com/ugd/ef0078_0e88fb335ad9423191794de3bd8592dc.pdf?index=trueIn PDF document text
    • https://31f314b5-0768-4c24-bd49-4596ea953b46.filesusr.com/ugd/85a4b1_ef457cc397904fe9b596ec8e20a7dc72.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/epson_workforce_wf2530wf.pdfIn PDF document text
    • http://wudokuzogikozu.rf.gd/the_colbert_report_best_moments.pdfIn PDF document text
    • https://19aaccd0-9772-41b6-85c4-be118606641a.filesusr.com/ugd/a12125_a5a9b184d39345edaae9f171af19cee7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/13027831854.pdfIn PDF document text
    • http://xijewixevav.onlinewebshop.net/ocarina_of_time_walkthrough.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_off0000e374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE374 5748 bytes
SHA-256: d35f4b39b82ae599bcdfa88cb61c267b1834700af39c8f30b6c181164b050eed
font_01_sfnt_off0000f728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF728 10708 bytes
SHA-256: 380229cfc5ab9b3a6ab14ca0715c072370672de75211361e20a5f12942154e47

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