Malicious PDF — malware analysis report

Static analysis result for SHA-256 51717fbfaebc34cc…

MALICIOUS

PDF

69.5 KB Created: 2021-02-04 13:52:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: dde274fd8a9fdcdd352248c6e0dda1d5 SHA-1: 5dfeec372f52375a39ba4b828ad34f00e96ca9e4 SHA-256: 51717fbfaebc34cccda811617bd2e7a1f5e3df94a137c8b18ca5f24a81923196
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/aws?utm_term=formation+and+function+of+cerebrospinal+fluid In PDF document text
    • https://falatunasozenu.weebly.com/uploads/1/3/4/7/134762474/migixemuwulaka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421780/normal_5fcae900f043c.pdfIn PDF document text
    • https://bisenazogogo.weebly.com/uploads/1/3/4/6/134686343/jinod.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/gjj0Ejh/pefowurivodufirimopiwuse.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/jeig9jb/bubble_tea_kit_tapioca.pdfIn PDF document text
    • https://faxomozux.weebly.com/uploads/1/3/0/7/130775398/kesabatota-vobezegumum-wasivuwamad.pdfIn PDF document text
    • https://cdn.sqhk.co/rubutemoxe/Eifgchc/digi_business_online_login.pdfIn PDF document text
    • https://cdn.sqhk.co/zodenizekija/phiFaSD/bus_racing_hill_climb.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/hg9idH7/86056865118.pdfIn PDF document text
    • https://cdn.sqhk.co/wunokebewoz/xigjaFm/12738967339.pdfIn PDF document text
    • https://cdn.sqhk.co/bupewazadufa/jhc9L1v/72374038850.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxabofapuw/jbridOc/kowokojajesejaga.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/jobavo/14802784377.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/jekegi.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/clear_perspex_sheet_cut_to_size_adelaide.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_off0000d0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D1 5396 bytes
SHA-256: 92f72568dc7e11fb2acc2114858a97e6f2813a8745e6cd051501755dcb6ca474
font_01_sfnt_off0000e30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30D 10716 bytes
SHA-256: 9c88c5647267326cbba148c1343ba3631b7af7bc08993a4a43cdb9e9e75a9fab

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