Malicious PDF — malware analysis report

Static analysis result for SHA-256 368761f7b703b3e4…

MALICIOUS

PDF

64.8 KB Created: 2020-12-23 23:03:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 84050485900d6f634baaf54a540bbe19 SHA-1: 06b70cd43f2d767f42c239ba8dd29cf9db7fc7da SHA-256: 368761f7b703b3e4de0393339e73a506cf852dcc10977cbc8f391f001575d38b
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 0.9979

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/strik?utm_term=guidestone+counseling+lancaster+ohio PDF link annotation
    • https://natagudere.weebly.com/uploads/1/3/4/5/134526504/e3f2da88857.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/damerirazib/wapking_audio_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e749fd43-f97b-4264-b67d-47cac8fd137b/41596629171.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/market_analysis_example.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/articulos_cientificos_medicina.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/66151664093.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/979b25f1-62e1-48f0-876a-daab1fa3f8c0/medieval_and_early_modern_times_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04f6181d-8f0b-4330-b79e-26c218c155f3/swot_analysis_of_starbucks_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/086dc0af-9322-4d6c-9295-700188adedea/export_google_photos_to_prime_photos.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_off0000c172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC172 5232 bytes
SHA-256: 502d5460e3098bf4cd700063996284cad79e32b7dd2fa059bf8977999f68ec90
font_01_sfnt_off0000d338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD338 10320 bytes
SHA-256: 98f4aab4d9f00741f57a8ed1dd73107b83e1828d076f7ba422bd6e7e585aaa48