Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c2bdf832c95275f…

MALICIOUS

PDF

68.9 KB Created: 2021-02-17 14:35:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 5bf23b61812b8d97b2a80cfc6aa5a58e SHA-1: 4eb0a74ecb61a7ecf3ed770499f2593306b8b992 SHA-256: 6c2bdf832c95275f0f0f9010a0c4db0e8d0d4ce4477bcf3012413f59dbcafcb0
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://crophysi.ru/123?utm_term=how+to+find+line+of+best+fit+ti+84+plus In PDF document text
    • https://cdn.sqhk.co/jufebarur/HhhmBha/83231477413.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/ggdhe2X/spacecraft_asteroid_itokawa.pdfIn PDF document text
    • https://kesiwupi.weebly.com/uploads/1/3/1/4/131407351/kawoxet-mibemolexejo.pdfIn PDF document text
    • https://cdn.sqhk.co/suwapipejob/iehecxM/7205268989.pdfIn PDF document text
    • https://cdn.sqhk.co/pobefozo/fddhhgi/52758021714.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/jayha0U/zuxosazemiwo.pdfIn PDF document text
    • https://cdn.sqhk.co/keviwebewuta/o8dgcif/tricky_brain_teasers_games.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/genedonapubefe/gelematulawonixusi.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/zuseminidawowevujanaxubuv.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/vcf_file_to_excel_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/18316347140.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/vewekewetozavorosajenixo.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/74365685679.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/50972352795.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/a_room_with_a_view_book.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_off0000cc20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC20 5204 bytes
SHA-256: 3dad4894939785d4e2681793a5dc43066c176a29e90f71bb7fd9704a733d33de
font_01_sfnt_off0000de02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE02 11652 bytes
SHA-256: aface663e6a8275b45995f7c182783f376adae09ec11929bdaca7ebb7eec9aa7

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