Malicious PDF — malware analysis report

Static analysis result for SHA-256 827bac93ea007330…

MALICIOUS

PDF

69.3 KB Created: 2021-01-10 17:51:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ff57b603e162d5657b5c1e257fe96dc0 SHA-1: 72be7a434bacaa786eb49ec782991dcffa7a19dc SHA-256: 827bac93ea007330c2e489c179fc8f456709f493ec1474bcb30f854c6f93cd37
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to redirect the user to a malicious site. No scripts were extracted, but the presence of the embedded URI strongly suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://trafficel.ru/123?utm_term=newton%2527s+rings+are+formed+due+to PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369802/normal_5f9f957feb871.pdfIn PDF document text
    • https://cdn.sqhk.co/nigulavax/igkgiIT/national_automobile_sports_car_association_racing.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416798/normal_5fd9e5aa71515.pdfIn PDF document text
    • https://site-1176708.mozfiles.com/files/1176708/rolutimaporubezowapujulid.pdfIn PDF document text
    • https://site-1203466.mozfiles.com/files/1203466/sarkari_result_jeecup_answer_key_2019.pdfIn PDF document text
    • https://site-1172079.mozfiles.com/files/1172079/jakep.pdfIn PDF document text
    • https://cdn.sqhk.co/togodawexu/WhdAjaz/galaxy_skateway_shooting_melbourne_fl.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/Njb8gd5/29469358787.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/ritoma/lutagukuletirom.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_off0000d000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD000 5288 bytes
SHA-256: e7796dd6828cf13594ee51834bd4193b68eb226494db55a70d351b83aa818c88
font_01_sfnt_off0000e207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE207 11472 bytes
SHA-256: 1c805f37d4655cd45280d246152a454317992fa098cc4a9263a8acb042c252c2

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