Malicious PDF — malware analysis report

Static analysis result for SHA-256 e87a0041764f8238…

MALICIOUS

PDF

41.5 KB Created: 2020-10-13 20:27:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 8214a70accb21a3c968ea452e479661b SHA-1: e3a53648ce0010006bb188d88ca4307a12fdce8e SHA-256: e87a0041764f8238f8cce76b5e61dc8081b6560af912e20086945ca1c4b05f93
132 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/strik?keyword=concrete+design+handbook+5th+edition In PDF document text
    • https://site-1043311.mozfiles.com/files/1043311/xefatuzidevekepevuxi.pdfIn PDF document text
    • https://site-1039954.mozfiles.com/files/1039954/gazexewurat.pdfIn PDF document text
    • https://site-1039000.mozfiles.com/files/1039000/10297313769.pdfIn PDF document text
    • https://site-1039517.mozfiles.com/files/1039517/fedamewimuroma.pdfIn PDF document text
    • https://site-1043047.mozfiles.com/files/1043047/gasuxazojukizu.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/xojajuv-mitegejitokuxig.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bagatazojiz_sidatasofugugor_sofaxazute_gureluf.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/aa94aa7f99c.pdfIn PDF document text
    • https://site-1037274.mozfiles.com/files/1037274/foduzoronilo.pdfIn PDF document text
    • https://site-1037074.mozfiles.com/files/1037074/64192030029.pdfIn PDF document text
    • https://site-1042620.mozfiles.com/files/1042620/zijuvoxuselasunudenimup.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/06379743-95a9-472e-87f7-52239de0acd7/9448508099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7e27517-f003-4f85-aaf4-6ff2a16deb7a/22592230450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6722e249-7980-4ab9-90c4-5121b2eecdb3/xubedazimetupebode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8855ab0-cb98-4621-b612-f0b83e68a811/waxubijotadijuli.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000622c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x622C 5400 bytes
SHA-256: bc5e023eaff80d2b2b2f4746e680b6e3d0975a5926e4c379a1d33db57650edb0
font_01_sfnt_off0000747e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x747E 10772 bytes
SHA-256: 251c03ce9aadf1cfff041d812e508a3dad09011b4710f6e6eb1e9e927f891749

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