Malicious PDF — malware analysis report

Static analysis result for SHA-256 61d2d6f98f0975b7…

MALICIOUS

PDF

73.8 KB Created: 2020-12-09 14:04:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 53f3e4786e2b37947bbb7e6efda5b1c7 SHA-1: 557cc6798999cba5e0b42ffdde1b4e9682676834 SHA-256: 61d2d6f98f0975b7cef485f694ad5a7ac254e77fa71b0cd565c7acc8a9e1ecb5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a large number of external links, with one pointing to a PDF file hosted on AWS. The primary URL, 'https://traffset.ru/wb?keyword=babette'%20s%20feast%201987', suggests a potential SEO manipulation or phishing lure. No scripts were extracted, but the PDF structure and link farm indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/wb?keyword=babette PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366050/normal_5f8c2a975c473.pdfIn PDF document text
    • https://wovodolu.weebly.com/uploads/1/3/4/8/134861979/linusekosebe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460449/normal_5fc1f189403ce.pdfIn PDF document text
    • https://tilobumofiraji.weebly.com/uploads/1/3/4/4/134492377/7479a6.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/ninazarila/muxebakumovutixaviw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc53ea4df132613bbda1867/t/5fc6068a1972c46e3c6d2449/1606813322595/79306715284.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d37a000-05ac-414e-a068-eed7e7419ea1/andrea_bocelli_houston_symphony_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16a9e7e5-40be-4d48-b49e-c17d8587edb7/dezeja.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/kugenulugisew.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/bomoxitoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/444fb4da-c2c0-4603-b532-b8a3049eeae1/10452133282.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/eu4_center_of_reformation_in_my_country.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2473305f-0fb3-483c-9d16-2dc6ee6a56ea/brother_loves_travelling_salvation_show.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/19917288220.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_off0000e26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26A 5336 bytes
SHA-256: 47517623707d11dd9fb773ef266af3e61c4e0d0a7a3a92f3c0b2c21397b36aa0
font_01_sfnt_off0000f4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B5 11364 bytes
SHA-256: 3aac95b370018a15bfa6c52ad217ae1d2d96ac560daf58fb087b3eb41b144e40

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