Malicious PDF — malware analysis report

Static analysis result for SHA-256 06cb950caa3e52ed…

MALICIOUS

PDF

69.2 KB Created: 2020-11-19 12:04:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b90f1c8341adaf141c6752505e0e5d87 SHA-1: 969378bc3acec596aa7ca1fd52ba9127bf58c202 SHA-256: 06cb950caa3e52ed622c7e95a52ef67bf4ae160f2dcdbbf6adb6017d5bf7ec75
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary URL pointing to a known malicious redirector. The heuristic firings indicate this PDF is designed as a link farm, likely to distribute phishing content or malware. While no scripts were explicitly extracted, the nature of the embedded links and the ML classification strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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/123?utm_term=image+9.5+elliptical+resistance+not+working In PDF document text
    • https://tipezigixak.weebly.com/uploads/1/3/4/3/134339593/roxoririnofo_bizarutuk_xoziluzotus_xedizakomu.pdfIn PDF document text
    • https://sutogibigasoju.weebly.com/uploads/1/3/1/0/131070189/271440.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477913/normal_5fae09241652c.pdfIn PDF document text
    • https://guboriratuji.weebly.com/uploads/1/3/4/2/134235556/migejisebujusakinape.pdfIn PDF document text
    • https://pepusaneped.weebly.com/uploads/1/3/4/5/134503703/xalux-nukutuw-puzesekeninidov.pdfIn PDF document text
    • https://livaganomin.weebly.com/uploads/1/3/4/3/134399079/7123764.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421339/normal_5fb2f1d184392.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/datarofapakil/bubilo.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/fotavuzubaj.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/sosafotovotuxatuxumo.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/4086132461.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/14203080082.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/fitzroy_river_rockhampton_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/cara_convert_to_word_online_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/bexivex.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_off0000cbe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE7 5656 bytes
SHA-256: a5e9972489716c28ff507224f06b7d89a6a5fc64099350d0f7faae0f4997d1b5
font_01_sfnt_off0000df2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2C 12212 bytes
SHA-256: 4fad325ea415e7cfcf17b2c1beb7affd6d7ed91489fbc86c34929855456afe5b

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