Malicious PDF — malware analysis report

Static analysis result for SHA-256 9427cbc2afa69d00…

MALICIOUS

PDF

68.8 KB Created: 2020-11-22 03:58:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 544ea587b29492f1759d55ee020c85d9 SHA-1: df9781ff212588dcf30945a9141ef1dc2b08d043 SHA-256: 9427cbc2afa69d00ad8af12bd77a0d23938a36d183dfd789499ce57c16d33726
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/123?utm_term=cell+biology+topics+for+seminar PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bepukuba/banking_services_chronicle_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/acute_pancreatitis_surgery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/801827a6-9191-40f4-9546-35ba738c476d/tulid.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/cryopreservation_methods.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/69934193754.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14b97f0f-ee84-4d39-8404-e39f8830a7f3/82730145895.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/canarias7_portada.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/subtracting_rational_expressions_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/bridgman_constructive_anatomy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b4768d6-6f67-4d68-95cd-55e9b57b3047/movkin_disguiser_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e722dae-c7cd-41fb-9377-d13840d5dbe4/northern_vermont_university_microsoft_word_download_os_x.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae636ca3-024a-4579-929a-a65673098ad7/77603063222.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e9ce8d9-3d15-4e95-a7c1-6f6a1120fc3d/gijelale.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 5484 bytes
SHA-256: 4298d61c6716fb07035b88a102041baf687b69a0c327b525d01667b7e3090666
font_01_sfnt_off0000e29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29B 10488 bytes
SHA-256: a0e46cd8d754826d8271e73b8b3edc7d7b24413bf41b29b9c51036bf08cf5fd6