Malicious PDF — malware analysis report

Static analysis result for SHA-256 5729c5d8350b2b43…

MALICIOUS

PDF

66.3 KB Created: 2020-11-23 14:39:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 731d996025a1ac0a81a51c206039da7a SHA-1: 1d9687df1d65b42aa08516b0e7f2ecb016ece5c1 SHA-256: 5729c5d8350b2b43f613c8e356efab9be54ee4085d4b023cc3ae9849a0ff1281
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a large number of external links, suggesting it is part of a link farm or phishing campaign. The primary URL, https://traffnew.ru/123?utm_term=far+aim+2017+pdf+downloadable, is likely used to redirect users to malicious content. No scripts were extracted, but the PDF structure and numerous external links indicate a malicious intent to drive traffic to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/123?utm_term=far+aim+2017+pdf+downloadable PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f8802c5b9082.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475728/normal_5fb3f04165e71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418984/normal_5fa9bfc3c9b8e.pdfIn PDF document text
    • https://julovupepopa.weebly.com/uploads/1/3/4/5/134522834/posunelevaxusu-jesab-xuwufilanunet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5fa872d7a723d.pdfIn PDF document text
    • https://muwidewosavuli.weebly.com/uploads/1/3/4/4/134435377/107585.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465127/normal_5fad68ed1a337.pdfIn PDF document text
    • https://dugeditukuvil.weebly.com/uploads/1/3/4/7/134723955/fb7a885ee9b2a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413712/normal_5fb4f642dca35.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/0882abd8-2ad7-408b-aa2a-628875d692f4/33368404682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a9136de-cd4d-4da3-93e9-4a9ce5cb9b01/ruvagitix.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_off0000c655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC655 5600 bytes
SHA-256: b16627dfef220627431c61da79407f6dc8636f0bd362ba0f510962bd5137de7a
font_01_sfnt_off0000d964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD964 10352 bytes
SHA-256: 695d27905f7f52d687786d28ec5a25c6049312a983d0a1a39526377a59068797