Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c38abeec40e0617…

MALICIOUS

PDF

73.8 KB Created: 2020-12-14 21:16:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cea344d7be42e0cfff3638fa925b95ab SHA-1: d39e4d724c7f2e0a1a31f99cb8bf5007dd5df250 SHA-256: 9c38abeec40e0617ec7e672513e5838a13e9324c819144538afe0da27e875b7e
214 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ClamAV detection 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' strongly indicate a phishing or malware distribution attempt. The presence of numerous links suggests a link farm or SEO poisoning tactic to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/strik?utm_term=behringer+x32+main+outs In PDF document text
    • https://najanirirapodu.weebly.com/uploads/1/3/4/8/134860062/63852803c.pdfIn PDF document text
    • https://sixodajumam.weebly.com/uploads/1/3/4/3/134311071/virepof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc4f9217848ba205d32d6b0/t/5fd1b675871f8c6e595afb9e/1607579255678/xujokelimivaneduziza.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf52d9a97599144eee2490/1606374109006/66344321481.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a88b8787e879898c667c/t/5fcc72ac920f47545b8c1457/1607234221923/wevetuvudagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b16d1f41-3127-4223-9560-199990085750/engine_coffee_table_ireland.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bc4f2b5-003f-4bc3-a665-03e2a95e103d/replica_tiffany_jewelry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b652e9d8-4987-4909-8394-a74880401fd2/50773096935.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50ae4a13a450bab0f051b/t/5fc7936c6beae454316a616d/1606914930854/room_escape_contest_2_solution_level_33.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce78d84db91f551566e8b0/t/5fd20f57eeaf2774ac93ad03/1607602010228/90841322593.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d5a2ab8-9b67-411d-b030-f8dac721a1c3/49784080446.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5fc46a0-0d19-433a-b07f-4ba6f8e9c7c5/runescape_giant_mole_hard_mode_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62ce8a47-f5d0-407b-91f5-99b641ee8a32/labimuzagarumizubil.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7820a04a8c57c148abc30/t/5fd22aa923f2866aa39291a0/1607609002409/67055665223.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_off0000e40f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40F 5480 bytes
SHA-256: 6e1f7d3e0c8919b06b1da2d9c836195392708198519299654da6cbe530a6d58f
font_01_sfnt_off0000f68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68B 10704 bytes
SHA-256: 852130ea208984efd96fa45f441c6794c35d4ed7bf1b9f110a484f5f0fe66598

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