Malicious PDF — malware analysis report

Static analysis result for SHA-256 b74b81f559fe5b36…

MALICIOUS

PDF

93.0 KB Created: 2021-03-01 16:25:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4576735778aad693b97b4813a7ca5985 SHA-1: 09e9fd26265ef3b63cf7ed12f07cc5e87374a76d SHA-256: b74b81f559fe5b36859b6a114cef7ba85f858d9e2f4260fc6fccc07bd51dc17a
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious nature of this file. Although no scripts were explicitly extracted, the presence of external URIs and the overall detection suggest the document is designed to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dugedepap.ru/strik?utm_term=what+is+reflection+coefficient+in+geology PDF link annotation
    • http://poxumanavofeboz.scienceontheweb.net/windows_system_administrator_l2_interview_questions_answers.pdfIn PDF document text
    • http://rilomenininun.getenjoyment.net/itil_foundation_v4_certification_cost_in_india.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/cZmij55/ninozumabaxugenuv.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/WW8F9Gm/vinopobuxijusa.pdfIn PDF document text
    • http://jesofoma.getenjoyment.net/what_are_inferential_statistics_in_psychology.pdfIn PDF document text
    • http://vurujupafowutox.mypressonline.com/xikugefosurenu.pdfIn PDF document text
    • https://cdn.sqhk.co/mapetidul/dgggjV2/37819129475.pdfIn PDF document text
    • https://cdn.sqhk.co/wosuzumamig/hd9ghmf/good_street_racing_cars_for_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/ghjjh1G/xovakulolezegatimi.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/gdhfFjg/bawenaj.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/yYkz2ih/skin_among_us_minecraft_4d.pdfIn PDF document text
    • https://cdn.sqhk.co/tewisifupib/Wiijjhi/rings_a_bell_allie_x_espanol.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/iibjhgc/avenger_layout_xcom_2_wotc.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/HhfZ9wd/99860200241.pdfIn PDF document text
    • https://cdn.sqhk.co/kevekelobivo/jFjazqZ/kukivizesitafokupimi.pdfIn PDF document text
    • http://xawamiwupajev.mygamesonline.org/sezikebefezim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://geforagegi.atwebpages.com/what_does_af_mean_on_cabrio_dryer.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001108e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1108E 5256 bytes
SHA-256: 0e1d6a521f71128aec3d35416e4871a7031635c720d2d206c866429cd7722025
font_01_sfnt_off0001227e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1227E 13484 bytes
SHA-256: 1d720886aff6a37a61530ed6dc8568115907b19daadc0307f8de782de9de5c03
font_02_sfnt_off000150c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150C3 16192 bytes
SHA-256: b8987608e74429a43279b631473b10a6179940079cd95b4bb6a6b0e3dc58894c

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