Malicious PDF — malware analysis report

Static analysis result for SHA-256 13315fd379ac4f99…

MALICIOUS

PDF

74.8 KB Created: 2021-02-15 06:32:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 633bc00f990de768177d69434878a76e SHA-1: 0cd47960d79f8a0e4c5c7e303dd32cdcf9bad87c SHA-256: 13315fd379ac4f991cb569b52e292199916ba77348dbd3648001acf02178c0e5
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'seumenha.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to 'Free running unblocked', suggesting a lure to entice users to click the malicious link.

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
  • 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://seumenha.ru/123?utm_term=free+running+unblocked PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4464302/normal_5fed119211bc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455183/normal_5fd60b8ef3e1e.pdfIn PDF document text
    • https://telozigigozato.weebly.com/uploads/1/3/4/3/134310186/2ee7d4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422390/normal_5ff67002d456c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476123/normal_60112b7644ee4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495241/normal_601632b5a00e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412413/normal_5fcf9320bb52e.pdfIn PDF document text
    • https://wisolowiguwo.weebly.com/uploads/1/3/4/6/134630140/f35739.pdfIn PDF document text
    • http://tozufokoxogo.22web.org/gopodizow.pdfIn PDF document text
    • https://fikadodovawewa.weebly.com/uploads/1/3/4/3/134320255/6061846.pdfIn PDF document text
    • https://digokevun.weebly.com/uploads/1/3/4/7/134747151/7252409.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476135/normal_5fec12c66bbd7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pobipegosaba.epizy.com/destiny_2_chalice_spreadsheet.pdfIn PDF document text
    • http://gevewodex.epizy.com/feelings_and_emotions_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/search_console_performance_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/36227901715.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_off0000e96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96B 4876 bytes
SHA-256: 350bbf89fb78c8f830e31207825d04cf1b56f6005e1fec86010617547cdfb36b
font_01_sfnt_off0000fa1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1B 10644 bytes
SHA-256: 34b41ec2968571d9a84f907f4b908c8cca560f5e70be194807bcf6890d49c45c

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