Malicious PDF — malware analysis report

Static analysis result for SHA-256 df44f834eac3a71d…

MALICIOUS

PDF

86.8 KB Created: 2021-02-26 11:22:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 0fda54ab01e931e5bc8d8657bdccaac4 SHA-1: 71f6b15cc4d013650a714dc68cb863299995ec16 SHA-256: df44f834eac3a71ddf3f82a4880758982286e068f3a6be835e08849aae01bceb
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is highly indicative of a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload 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/award?keyword=what+are+the+hse+top+5+health+risks PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385859/normal_5ff8d749793a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491925/normal_600727d7cbd83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408483/normal_5fe856d52a5e4.pdfIn PDF document text
    • http://keysecret.ru/comptia_a_1001_and_1002_study_guide_freenko9h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479938/normal_5ff4472ced20a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488329/normal_5feb2fd2ec774.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445320/normal_5fef9723b72a7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/83984688453.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/vw_vcds_free.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/adobe_premiere_pro_cc_2019_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/inventory_form_templates.pdfIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/how_to_get_mildew_smell_out_of_lg_washing_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/46181041119.pdfIn PDF document text
    • http://zogadawedalifap.onlinewebshop.net/line_6_pod_2.0_battery_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/rewamejelogav.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/telecharger_les_journaux_algeriens_en_arabe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0C 4788 bytes
SHA-256: cda097f5916abcde1aac6d15620841e6803cd72373fc375ac698710e17268791
font_01_sfnt_off00011b73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B73 10692 bytes
SHA-256: abc18159619473aa6d293584d1dbbadd1473028a2cffde58f9e3443ec998aed4
font_02_sfnt_off00013fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FB5 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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