Malicious PDF — malware analysis report

Static analysis result for SHA-256 295d693f8fecbe25…

MALICIOUS

PDF

94.0 KB Created: 2021-05-14 05:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9a925a43ac6d4e59e3c6f48867c45b3d SHA-1: 709736155414f41133b21b724ca2f85ecb60346c SHA-256: 295d693f8fecbe250e8925cd0c68c718e755f49221fd0cad338b785d9332c9a5
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_URI' heuristics. The ClamAV detection and ML classifier also strongly suggest malicious intent. While no scripts were explicitly extracted, the structure and numerous external links suggest an attempt to redirect users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=engineering+materials+list+elite+dangerous PDF link annotation
    • http://pushbiz.fun/citra_for_windows_10qmd3o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448746/normal_6043320fe91f8.pdfIn PDF document text
    • http://garantiya62.ru/enteral_and_parenteral_feeding_guidelinesk0s7w.pdfIn PDF document text
    • http://ita-yog.space/non_aromatic_compoundsuh16s.pdfIn PDF document text
    • http://helplnstagram-confirm.com/dezimujetibodi2vb7h.pdfIn PDF document text
    • http://idealica-ordina.site/679906816679bfqt.pdfIn PDF document text
    • http://womans30planet.com/sas_proc_univariate_histogram_axis_rangexfscu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393511/normal_602a965cd646a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449768/normal_5fc80e7bb64fe.pdfIn PDF document text
    • http://madamzero.com/youtube_english_grammar_course_for_beginners2sbwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483623/normal_5fd91b7627254.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_600dc94e91beb.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/gapuruxumeg/niseleja.pdfIn PDF document text
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_72f5a373c3ad42c7b3ea191786ffd6ac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/garevedosefabun.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/hp_officejet_j4680_ink_cartridge_problem.pdfIn PDF document text
    • https://adc0bc6f-2b4d-4951-bce0-9128d215fa34.filesusr.com/ugd/5ea4d5_82f4af4aebd943f9b6e2c3542b87712f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/finance_spreadsheet_template_uk.pdfIn PDF document text
    • https://fb075467-9d00-46c6-93ac-2b777f5e584b.filesusr.com/ugd/8bcd66_197f2832ca464dd4bf0d4c690321e5ca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vutame/23764723929.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/beths_grammar_school_sixth_form_open_day.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/algorithms_sanjoy_dasgupta_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/allure_report_maven_example.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/18176941981.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/camp_chef_pellet_grill_steak_recipe.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_off00012d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D67 5100 bytes
SHA-256: 664c121c2e36cb0c617772344dfd618c5e9582e50ef962944c73e335c4847710
font_01_sfnt_off00013ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA8 13276 bytes
SHA-256: 8648ee158ede8b1edf28d85d8cc7f7e4720e66c6d6045aec4df5d962aa87fd34

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