Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e24ae2d974cb131…

MALICIOUS

PDF

79.7 KB Created: 2021-04-05 14:26:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6af9c41ff67619547b3de3e8053df045 SHA-1: 74ae3b2e78a3ff5834bcd3963036191f0561127a SHA-256: 9e24ae2d974cb1310dbf17845ecf2bed200117a1aa304592a0ae8f9c6c1a7abb
156 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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/award?keyword=human+anatomy+and+physiology+pdf+in+telugu PDF link annotation
    • 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/sojebelevenex/82079140007.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/21960431771.pdfIn PDF document text
    • https://d525ee04-2a40-494f-8ba9-fee52f7b18ee.filesusr.com/ugd/8b8e24_db95e13163ca4066b1c5216a616aceeb.pdf?index=trueIn PDF document text
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_3b6884c9a0e942b5a4a0a7f013de4243.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/islamic_caliphate_history.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/99432709540.pdfIn PDF document text
    • https://ded05c8b-f0d8-42bc-a64b-daa0b63394ca.filesusr.com/ugd/99afdc_7c54a3a5d28640dfb2787eae4aba3fdd.pdf?index=trueIn PDF document text
    • http://bezopiwuzalobit.rf.gd/artery_pal_2_pro_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/dudun.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/aditya_birla_health_insurance_policy.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/nanezubok.pdfIn PDF document text
    • http://puredaw.rf.gd/iceland_self_guided_tours_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/xozivu.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/why_does_my_dish_keep_say_no_signal.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/24107037506.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/13131456817.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/25957807553.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/student_information_management_system_project_in_php.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/bcom_ka_full_form_video.pdfIn PDF document text
    • http://domemop.epizy.com/powareneruxafadifo.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_off0000ec2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2B 5304 bytes
SHA-256: d3fa038a085bef6f6487829724cd7c6907d752aebe863811713a4f81438d50ce
font_01_sfnt_off0000fe14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE14 11008 bytes
SHA-256: 8dd8eeef05a41df3531bac4e17a359db519ac6d62c343528bf5d7fd876c9dcf0
font_02_sfnt_off00012374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12374 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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