Malicious PDF — malware analysis report

Static analysis result for SHA-256 005fc116940cb3f2…

MALICIOUS

PDF

69.5 KB Created: 2020-11-26 05:10:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: fa3baf609307e608282319e93e55ae32 SHA-1: 534ae6f0d67350300a329fcb905b7e5eb83bb04f SHA-256: 005fc116940cb3f217c31477a587913b81f9898f14446a11c8392080aa2bd07d
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, with at least one pointing to known malicious redirector infrastructure. The document body is heavily obfuscated and appears to be junk data, suggesting the primary purpose is to host these malicious links.

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://traffking.ru/strik?utm_term=the+turtles+she%2527d+rather+be+with+me+live In PDF document text
    • https://pururejipe.weebly.com/uploads/1/3/4/2/134265449/danodatufafageni.pdfIn PDF document text
    • https://wumunelopilum.weebly.com/uploads/1/3/4/3/134395902/04bc41c5bd.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/3d21f99.pdfIn PDF document text
    • https://zepekerikolex.weebly.com/uploads/1/3/4/0/134017535/851babf3c2c.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/e25e6ee7-2fc0-47e4-9f10-dda5d8e11ac2/juvowajijudaso.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/biseni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74a056ed-3b00-4f06-a1ba-0f05ea9278e2/messenger_dark_theme.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/read_and_highlight_on_ipad.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/peditajaxebomubasemaj.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/bosch_home_professional_vacuum_cleaner_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b52bb160-f689-4088-be5d-458ce3331c3c/pabezabozuxop.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/alternaria_porri.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/tubibiriboraxirojo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cac4b87-d0c8-4d9b-8f5f-dec9d27dc767/60170168019.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/9550198591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6da3b8b3-390a-4e08-921a-b5f07c7c9508/74325060938.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_off0000d2e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E4 5340 bytes
SHA-256: 59d77dacf52e36264c80b2c821af5f8b72dad0f76c53b136ff8ab8fc3bb09e81
font_01_sfnt_off0000e4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F9 10332 bytes
SHA-256: 05dccab8b766a636a286994f0dbcedc59f882221fb2f82ac169e1da50482d4e0

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