Malicious PDF — malware analysis report

Static analysis result for SHA-256 9832fc5e23462d93…

MALICIOUS

PDF

44.3 KB Created: 2020-10-06 18:09:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 6bf0c91141f897687a7c6ab8be23a04c SHA-1: d89870a11c35b6abe9fc251b52c7eec5cbc44859 SHA-256: 9832fc5e23462d932838fc943fbbb8af5f3e9c35062f6774907baf184d83d818
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?keyword=update+android+version+samsung+tablet In PDF document text
    • http://gexid.popkoshop.com/uploads/1/3/1/4/131453870/88957b1692.pdfIn PDF document text
    • http://files.lowellmagenealogy.com/uploads/1/3/1/4/131408248/4197317.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8522/4872/files/rapijozewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2951/0814/files/delazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7720/6178/files/all_my_sons_character_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8188/2013/files/6361712247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0633/6924/files/pathfinder_witch_patrons_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8754/3964/files/scarlett_johansson_eyes_colour.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ce14533-e49d-4c83-b9b6-c87b1c84eb12/88402672915.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c97f959b-569c-4f9e-aa37-108664c99157/wabefatebilesubejozesama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c050157f-c7f5-4f72-98bd-fdd9024ad662/50523902160.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_off00006dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBE 5472 bytes
SHA-256: f7e9ff9df4ba056242e67a7b633803143d77bb06dcccaabfbd6ef2cdee7fdb60
font_01_sfnt_off00008043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8043 10684 bytes
SHA-256: dec667a14aa3fb6dbbd84e76121e8e372c2b4703d44d8926dfb69d3b02fcc178