Malicious PDF — malware analysis report

Static analysis result for SHA-256 f804604f6aa20475…

MALICIOUS

PDF

69.6 KB Created: 2021-02-18 14:31:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0821ee3915d24a838a9c10a5d53e682a SHA-1: 7e288c5d5f38dc2f4798b81fa86382c6be91acbb SHA-256: f804604f6aa204758bf4d97a3e861f8ec3e143a9536916f849399040e03ef5ed
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/wix?keyword=mortal+kombat+apk+free+download In PDF document text
    • http://zegofivuwirukon.22web.org/testing_transformation_efficiency_competent_cells.pdfIn PDF document text
    • https://cdn.sqhk.co/kitolitik/ijjJHKc/putefimodotisurokike.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500438/normal_60178288838e8.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/M6gihiq/mtf_srs_surgery_results.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389106/normal_5fd33b277024f.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/lsvjfgc/71029572475.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluzagile/eW0jexu/zalifobubelisiwodi.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/KWhfzZt/juzefizabodepedat.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/timeziso/6846565929.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/relay_type_voltage_stabilizer_circuit_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/annapurna_trek_sans_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/hollow_knight_white_palace_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/4392978551.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_off0000d4af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AF 5312 bytes
SHA-256: a812949470fb7325fba8b9326e215dacdf466fc4c0652771840eb8c996217726
font_01_sfnt_off0000e6c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C1 10392 bytes
SHA-256: 3c6a66e66734bd61ce790947c9a8f828b532b246631376308374b38fbbe3c492