Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a84aebd45b1759a…

MALICIOUS

PDF

70.4 KB Created: 2020-12-16 14:12:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 05920f5f189460d83e7f4b6044d3163d SHA-1: 012ac1228a931422a829ebc5b2672e27cbfcec70 SHA-256: 4a84aebd45b1759ad377199bf4a9fe49901ab25213f75a3ae47abb4b68cd0968
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://gettraff.ru/wb?keyword=safety%20data%20sheet%20for%20general%20purpose%20cleaner In PDF document text
    • https://biwawidojimu.weebly.com/uploads/1/3/4/6/134648839/5f5454892bc72a.pdfIn PDF document text
    • https://vepakuwaderim.weebly.com/uploads/1/3/4/6/134699920/dutefulurunovo-vajufuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425487/normal_5f9a0c88f2108.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/sepawi/convert_file_to_dwg_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/mumiwadamulisokub.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/rukitetubabiganoxowiso.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc106a17848ba205d193829/t/5fc26b6008845d0924d83f28/1606576992723/miroxigakiziniladirekil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cf41276-c6e4-4ded-a711-3f2e703e16b2/jiwisuborurajer.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/ferris_bueller_s_day_off_full_movie_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/anthony_giddens_sociology_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/92547216413.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/gabafuti.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/gipipidomivuruboj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf57b05147b148042a4b19/1606375346774/south_chagrin_reservation_map.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/pomorunozaru.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_off0000d668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD668 5620 bytes
SHA-256: 659cf3fc0922f3b5a4156a43277c40670dc7ac86f5af9c010c5bec78132d5b0f
font_01_sfnt_off0000e993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE993 10152 bytes
SHA-256: d12e658c98c39815273ee19bd8c3344b3c5a38858b76f4ea864aaa4e17c1c304

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