Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff557b15b59502e9…

MALICIOUS

PDF

65.6 KB Created: 2021-02-26 08:33:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e78e5a38e7d0d4b66b35b17b2f4bea14 SHA-1: c47bc654c4ee03355c569f247d3c9ee93a75c411 SHA-256: ff557b15b59502e95e910a5e41e041a05c8e971e1575091b1519ac7f36234485
194 Risk Score

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
  • 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://yafferge.ru/wix?keyword=360+snake+unblocked In PDF document text
    • http://stroy-level.ru/69259145203a5tpl.pdfIn PDF document text
    • http://cccckkkkkdd.space/78093681953ddxc5.pdfIn PDF document text
    • https://wolaserirefuf.weebly.com/uploads/1/3/1/6/131637046/vubetofegapimi.pdfIn PDF document text
    • http://idealica-uficiale.website/bowuvizipuliif1r.pdfIn PDF document text
    • https://rupilobeva.weebly.com/uploads/1/3/0/7/130775598/sanulobeda.pdfIn PDF document text
    • https://waseralubireg.weebly.com/uploads/1/3/4/6/134622629/1280145.pdfIn PDF document text
    • http://bavomobes.22web.org/89765176323.pdfIn PDF document text
    • http://yognat.space/660212908225yqf2.pdfIn PDF document text
    • http://copyright-notice-ig.com/befaxupu4xzvm.pdfIn PDF document text
    • http://hookup666.site/imperative_sentenceshqizt.pdfIn PDF document text
    • http://discount50it.pro/riccar_sewing_machine_manualegthz.pdfIn PDF document text
    • http://musofiron.ru/vumoseripizha5pe.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/bopuxosavubare/manualidades_de_hojas_de_papel_bond.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/landing_page_travel_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/13251833815.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/82529581213.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_off0000c5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5DD 5404 bytes
SHA-256: f0c0ec0ee79a8a0d4d619f0a10b63152f708405a5b10938ef0f763f4dda39dc6
font_01_sfnt_off0000d844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD844 9824 bytes
SHA-256: 4e80fd6ddf713797e42a6c760ca86756148f5304440588176c1d744bcaaa7d6f