Malicious PDF — malware analysis report

Static analysis result for SHA-256 829beb3f42d2d54c…

MALICIOUS

PDF

74.4 KB Created: 2021-03-19 19:39:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45f2ec188c74d5e065b6001a22bf70d0 SHA-1: 29ef18bb345b8e3ab178e6a9360e86862f996c77 SHA-256: 829beb3f42d2d54cbb2fd3d28d1e7e02877eb896fe038c119779b1be5f9f326b
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution. The document body, though heavily obfuscated, appears to contain keywords related to accounting, suggesting a lure to trick users into visiting the malicious URL.

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://resalured.ru/award?keyword=basic+accounting+journal+entries+practice+pdf
    • https://cdn-cms.f-static.net/uploads/4458618/normal_6037c635a2f41.pdf
    • https://bufibefoxoxopij.weebly.com/uploads/1/3/4/4/134489975/wasodubadug_zozolar_buwerixixivu.pdf
    • https://cdn-cms.f-static.net/uploads/4421051/normal_6046eef567aef.pdf
    • https://tibilizam.weebly.com/uploads/1/3/0/7/130775373/wokenutij.pdf
    • https://static.s123-cdn-static.com/uploads/4370269/normal_5ff166bcbaf59.pdf
    • https://static.s123-cdn-static.com/uploads/4464077/normal_5fe03b2be8b7c.pdf
    • https://xitukamobem.weebly.com/uploads/1/3/4/6/134643312/worilobozizigezapefa.pdf
    • https://nojinogexosop.weebly.com/uploads/1/3/4/6/134695112/3707213.pdf
    • https://vipegiwofavagob.weebly.com/uploads/1/3/5/3/135302795/7252091.pdf
    • https://static.s123-cdn-static.com/uploads/4391893/normal_5fefbe279978b.pdf
    • https://lokuzovitopoz.weebly.com/uploads/1/3/4/8/134871506/jivamisofemimem.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/levumoduf/platform_wedge_boots_brown.pdf
    • https://s3.amazonaws.com/lekezaru/unamused_emoji_android.pdf
    • https://uploads.strikinglycdn.com/files/5708d42a-278c-49ac-8414-26bc921440af/23791946788.pdf
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_b99f294e16874e5e82925e5634d972a0.pdf?index=true
    • https://s3.amazonaws.com/pululusodogi/kaluginonivamurezip.pdf
    • https://s3.amazonaws.com/mejados/nilelebop.pdf
    • https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_f48f6d3d2f50409ab22ec7776141f0b6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/01b26447-860f-4a6d-ba4c-0f012bceda35/40252138188.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e21a.bin
1be493671f027d660ace44fefc306e0cbeb7bfc52e020ecd497f4fd4a985b047
pdf-font-stream PDF embedded font (sfnt) at offset 0xE21A 5448 bytes
font_01_sfnt_off0000f4ba.bin
392b441b96a0486f289b70f7d9534ac711774ffb463dc8bd397f2fddd1b9c164
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BA 11036 bytes