Malicious PDF — malware analysis report

Static analysis result for SHA-256 815eecd2341c051e…

MALICIOUS

PDF

197.9 KB Created: 2021-01-21 10:06:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: f7dbd7483d0a37a351164ac78bb4f93e SHA-1: 9a3ad6edd43e8e919b1566c94178d3ebf9717626 SHA-256: 815eecd2341c051e5203f62409cdca96e49228a6bfb72749ba3fbf9b2bef4237
154 Risk Score

Malware Insights

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

The PDF document contains a link disguised as a free download for a network marketing book. This link, however, redirects to a known malicious URL, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URL suggest an attempt to exploit users via social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/123?utm_term=su+primer+a%25C3%25B1o+en+el+network+marketing+pdf+descargar+gratis In PDF document text
    • https://cdn-cms.f-static.net/uploads/4468837/normal_5fd1d004563eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460677/normal_5ff4d34419138.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419430/normal_5fdf5821e0bd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394082/normal_5fb9cd1d5fa67.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/mipovav.pdfIn PDF document text
    • https://kajuzenutojaso.weebly.com/uploads/1/3/4/6/134631714/sabakazosoba.pdfIn PDF document text
    • https://site-1174761.mozfiles.com/files/1174761/edtpa_task_1_template.pdfIn PDF document text
    • https://namoxatiki.weebly.com/uploads/1/3/4/4/134477177/lofesipe_guwemijosefan.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/jobavo/zajarifinaronezeno.pdfIn PDF document text
    • http://mitotubuxabax.epizy.com/digital_check_scanner_cx30_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/wagekopujifalirobusoxi.pdfIn PDF document text
    • http://varaxekewuveza.epizy.com/cosori_electric_pressure_cooker_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/dead_letter_queue_in_mq.pdfIn PDF document text
    • http://dumudolaba.epizy.com/kegaxixiluretukiv.pdfIn PDF document text
    • http://zubeleboju.epizy.com/zukakamivuroguk.pdfIn PDF document text
    • http://xepadegi.epizy.com/kenya_national_census_report_2009.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_off0002ca26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CA26 5944 bytes
SHA-256: fea7385a5832e2926cd014378343eea15bc4f2d605e8b1cd5807d2c2770210c6
font_01_sfnt_off0002de25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE25 12444 bytes
SHA-256: d7832854e8d9f791e4e68a8bf0eed93bfaf5f9fea2cdf72a18ce260fb0ca1355

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