Malicious PDF — malware analysis report

Static analysis result for SHA-256 aefb34437ee7d142…

MALICIOUS

PDF

48.6 KB Created: 2020-11-09 00:12:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: aca07ec22afc04eb2063c62126b94820 SHA-1: ae20bb22b3109ae185289616c1de87c799da6e60 SHA-256: aefb34437ee7d142dc24b5dbb14445045689c86551193c181791d7a09cf8997b
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trafftec.ru/123?keyword=basic+editions+shorts+women+s PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446158/normal_5fa0047373895.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390366/normal_5f903b03dd274.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383300/normal_5fa86aba8c9f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374689/normal_5f8a927a8ccbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5f8b5e507dd4c.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/623585de-4502-463d-9be8-5ba7c4ae8023/19025629876.pdfIn PDF document text
    • https://sisiviweze.files.wordpress.com/2020/11/goresosuvufat.pdfIn PDF document text
    • https://vipuvixo.files.wordpress.com/2020/11/92295293341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70c823be-281d-4d21-b13e-c498de22f200/62054974498.pdfIn PDF document text
    • https://rukawakoxofo.files.wordpress.com/2020/11/xidilijoxakofufakivisiti.pdfIn PDF document text
    • https://manetomimexa.files.wordpress.com/2020/11/68091325827.pdfIn PDF document text
    • https://zukujevi.files.wordpress.com/2020/11/iridology_chart_for_dogs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa2b49da-2a7c-41bd-843f-961f59b3a367/32653852173.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_off00008032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8032 5288 bytes
SHA-256: 5c108be78e93918e8e16c8aa6eafe9444ae1143faca02c0d80eff91fe73803de
font_01_sfnt_off00009210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9210 10348 bytes
SHA-256: ab74b5bb4ab4d4037c356077392e1db9e1e3bda1f06ac90ff09094f6ff8c01ad