Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e50ad2b375eb293…

MALICIOUS

PDF

77.5 KB Created: 2020-11-20 02:19:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 35613f7b65fe98bb9515c6454328bd0c SHA-1: d2907c558704f8666ee24c0d64f85cf7a8e4d898 SHA-256: 5e50ad2b375eb293fd34e96aa678586a77a995194f2f0a6baf3ecb2566a0adf4
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one pointing to a suspicious domain 'trafffi.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, likely for SEO manipulation or to host malicious content. Although no scripts were explicitly extracted, the presence of external links and the ML classification strongly suggest malicious intent, possibly involving JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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?utm_term=alfred+hitchcock+presents+lamb+to+the+slaughter+hulu PDF link annotation
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/rojubobirufo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390057/normal_5f8e4fd235f43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414159/normal_5f9f5df10cce4.pdfIn PDF document text
    • https://najuxobetejip.weebly.com/uploads/1/3/4/2/134265875/mulewefaseg.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/33b28c19-00f1-49c8-a5c8-c0e6aa2e623f/52297898075.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/161_spring_street_melbourne.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/alphabet_militaire_international.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/teacup_yorkies_for_sale_in_kentucky_area.pdfIn PDF document text
    • https://s3.amazonaws.com/mupakijivuruzim/pat_and_jen.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/village_of_barovia_church.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_off0000f299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF299 5760 bytes
SHA-256: 4c7fc8059d1248ecc469ccf21149d404e0a383add4a92ed7a63a2641c30452e8
font_01_sfnt_off0001060a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060A 10284 bytes
SHA-256: 36e47ddd64cdd1f4466f9d7215f102bb31439f6428d77992b7305d721e574b06