Malicious PDF — malware analysis report

Static analysis result for SHA-256 caa01414ee969be1…

MALICIOUS

PDF

63.0 KB Created: 2020-11-24 06:13:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: afc3596f5487e5f93bae5fb55df145eb SHA-1: 17e73b3854a4bda7cd450ade5567520345c45c76 SHA-256: caa01414ee969be1255eb147b05a7527f871f29d13f328724b7c100213deb539
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URL that redirects to a known malicious domain, likely intended to trick the user into downloading a secondary payload or visiting a phishing site. The document body, though heavily obfuscated, suggests a lure related to educational materials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/aws?utm_term=chapter+8+equations+and+inequalities+worksheet+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377125/normal_5f9ad475d48b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380699/normal_5f8c12ef3834e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/39bd9115-6c25-4ced-be9a-e2218b62a535/answer_heating_and_cooling_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c08e499-ad51-4923-9313-84d95e3aeb72/89268308368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9776385-5afb-4a7c-8542-df065954f329/fire_hd_8_tablet_with_alexa_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99d4e094-e89b-4934-943f-aec5587694fd/men_in_tighty_whities_tumblr.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/sevetubiwunelojadapep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23fafeff-ab80-413c-954e-f8131c8a28f6/sustentaculum_tali_fracture_radiology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c199173-ed4c-4311-95ab-44d7a44ed0b5/cardiologia_pediatrica_libro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd33135e-3f19-41be-bb79-b4fd13f5ccb9/army_hipaa_training.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/fisher_price_kitchen_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc6136ce-9fb0-4238-b00a-a66963956f41/yin_yoga_poses_for_letting_go.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e72604e-311e-4272-b55b-3a8bd9efedd8/zusufesexol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23bde77d-ef2f-46e9-a262-9cd785654e22/85053863975.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/jazz_guitar_arpeggios_patterns.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_off0000bb61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB61 5428 bytes
SHA-256: 144568c5131561be9f86a15deeeb2af6c12ac083242b30425aaef3ae2fd67816
font_01_sfnt_off0000cdd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD5 9688 bytes
SHA-256: ae07d6c78055ca2a2c325a2cc616ba532f4fe8d0cbb97d926fa76a44593f666a