Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4f3359142640b85…

MALICIOUS

PDF

54.7 KB Created: 2020-11-06 12:04:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 88d1fd929b2109f1c0401030bb77ea43 SHA-1: 10c53178766dc900406bf13f07020c1bfaa4d37f SHA-256: f4f3359142640b85a76da8f5f4c8c649c98ed6d3e56ce64d69b08c032fe51c43
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, indicating a potential link farm or SEO spamming operation. The embedded URL 'https://trafffi.ru/123?keyword=watch+pacific+rim+online+2013' suggests a lure to potentially malicious content. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious intent, likely to drive traffic or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?keyword=watch+pacific+rim+online+2013 PDF link annotation
    • https://lujisitezolip.weebly.com/uploads/1/3/4/1/134109273/52abfd.pdfIn PDF document text
    • https://vosasavowaje.weebly.com/uploads/1/3/4/5/134587316/f506d7.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/fimidakizesatu.pdfIn PDF document text
    • https://ranerenonosojib.weebly.com/uploads/1/3/1/4/131483420/pozakexobufiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420037/normal_5f95f130ded12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404965/normal_5fa4fda7e353e.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/66f03be1-6685-41f1-b1e7-6e252207e65c/xatiporibizipevifejoni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c7ac194-e2b8-4573-a7fa-a77835137f83/jodojerukiwusekupaval.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/penemuruvilaxatuvipedu.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/77136351840.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/jasos.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/82465873561.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/vw_passat_tdi_manual_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/the_hangover_part_2_putlockers.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_off00009486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9486 5580 bytes
SHA-256: c783b7f9bc03d82655fd760e8ea4a3f832c14f696c887eaf6255e88b8d9acc41
font_01_sfnt_off0000a76f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA76F 11632 bytes
SHA-256: d3cbcb088dcdedac1b0bcc4808555f1e85f67f38eae4643249bc829762739c6f

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