Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fc4fb706c8893b1…

MALICIOUS

PDF

46.8 KB Created: 2020-11-05 02:42:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 67d09cd5c9fe9f80abeb0507c8e10aae SHA-1: 9598f5f858c356f846f3dee3986ce1c48b368bb6 SHA-256: 4fc4fb706c8893b1346fb766432e02ef0765fb654ae9144f379b7132beaeb2cb
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://ggtraff.ru/strik?keyword=spring+internships+2020 In PDF document text
    • https://kivofijola.weebly.com/uploads/1/3/4/3/134309380/fuxodas-nemapam-jovum.pdfIn PDF document text
    • https://paxesejok.weebly.com/uploads/1/3/4/3/134348383/39c33.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/faluzotixupi/juxuviwafujirozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8605b16d-0855-4c23-ad70-dc876accf834/all_amendments_indian_constitution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa312380-736a-4121-88f5-a545a0fcdd30/85275067447.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72063a53-826a-4a45-9b2b-0610e5496c4f/ezmp3_file_upload.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/882ab920-5f8d-41f8-8042-d3990f50d8f6/purposes_of_the_aaronic_priesthood.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/gauge_to_mm_indian_standard.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/tukuximinupitekeruk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5657/6667/files/tebutimutejavanor.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/8754536899.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c4e9c4a-90e2-42c1-ad16-e5bc428a5833/popcap_games_collection_installer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2f86fbb-6ae3-4b6c-bb65-eddeea8b2d71/gujikanezu.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/gobude.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_off0000789d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x789D 5216 bytes
SHA-256: 56b55652f404d14708f1383f0446d51c5493e9f68e85aeedff88afc0907d5b81
font_01_sfnt_off00008a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A5A 10612 bytes
SHA-256: 33d7e73bbbfdfb26c6b77fb6ab6de9acebd7721aeb6c11142754e318d3503386