Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eeba5c786c3df35…

MALICIOUS

PDF

34.4 KB Created: 2020-10-03 05:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ebe838ab3f4fd2c142ffa34de8b75767 SHA-1: 66a2f3b7f09e7c5e880e45f56bb49f1bf713272d SHA-256: 9eeba5c786c3df3523c61611207e6e5e601fdd6c9625738cdcb8adfdb530c914
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector. The presence of a large number of external PDF links suggests a link farm or redirection scheme designed to obscure the ultimate destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://gettraff.ru/strik?keyword=ge+lunar+prodigy+service+manual In PDF document text
    • https://site-1039443.mozfiles.com/files/1039443/22193890918.pdfIn PDF document text
    • https://site-1036820.mozfiles.com/files/1036820/10784418271.pdfIn PDF document text
    • http://files.7tucker.com/uploads/1/3/1/3/131381540/moderisonobu.pdfIn PDF document text
    • http://mawekej.jhbgroup.org/uploads/1/3/0/8/130814729/lexizadu_relafopijugoji_rasijirikig_xupojuvabunu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c14a3391-f16f-4068-b9f7-ea0b261a6e09/xejagidis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67737469-40ab-418c-8baf-bf1c93df7f55/digoveboxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cb71142-cf32-4c01-8eff-8573569f7c35/bipemojofutaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b748b1ad-50f6-4533-a449-2db5e135ce27/93708722344.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f250962-5d44-4ff2-91a3-b23631694c29/52429596588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58083072-8747-402d-9630-73effcf98968/18606287671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b69d9348-f3fc-4e2f-a50b-30fb911a3ff9/nosijugevijojakemavav.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_off00004825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4825 5584 bytes
SHA-256: 297e6744c8114cf074cd58184a6ea309ca464460f870530d0e4e6371a57ad154
font_01_sfnt_off00005b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B29 10024 bytes
SHA-256: c67065bccdb710d8213e960aba79ca70df358899e64ee0c60eeac2e1e2a525b3

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