Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d872a94b9f0b7ef…

MALICIOUS

PDF

75.4 KB Created: 2020-12-17 05:07:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 58a857e476975c76a1ee7679306fdd5b SHA-1: 0c2890a01776653d67b4a20bbe6916482b6bd617 SHA-256: 9d872a94b9f0b7efddce5d0d91c6a94da2755a6104056ec91afbac98d373fdca
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/aws?utm_term=best+love+poetry+books+pdf PDF link annotation
    • https://gunevutatute.weebly.com/uploads/1/3/4/3/134361501/6855238.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494136/normal_5fce53c21c615.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404730/normal_5fa2b06139eb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386605/normal_5f96c4396e42d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474220/normal_5fd1c28f99e54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373517/normal_5f948b0952c94.pdfIn PDF document text
    • https://zujuwedidikaf.weebly.com/uploads/1/3/4/3/134375258/jemefowitufas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463824/normal_5fb923ce68e5b.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/a1e8da7f-670e-4660-9e86-4c6c1bd87757/24211075222.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ac61bc2-d110-4fdd-b392-8d406d49ba00/emnlp_2020_cfp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fa374cd-7af3-4bbc-9cb6-5eb9eaee39c1/1595257631.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35b71769-82ba-497b-9d14-cbdb6ab23995/65961098034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39375683-04ee-4c76-b992-12ffb8634d37/keeneyville_school_district_20_calendar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e4a7952-c230-46e4-86f9-c357fd17cd9d/nizifizewevokikadat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a69ec4b-1d9c-4b51-b414-ac75544f70b4/nejored.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_off0000e97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97C 5240 bytes
SHA-256: d42af40760365b316df4ebba010ba3079ca154547f52f263fd521114c7e39717
font_01_sfnt_off0000fb6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6B 11068 bytes
SHA-256: 1812db3d889d88896dea8a9bb43646956ae066bc79cd9cdebd347ddbf38027e6

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