Malicious PDF — malware analysis report

Static analysis result for SHA-256 b28366ec0b194316…

MALICIOUS

PDF

62.6 KB Created: 2021-02-23 23:39:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ef54c88171eb46edd77bc55ac836814e SHA-1: 8b7ab6f428f14c8cd0e8906e310b226e2bd16e9f SHA-256: b28366ec0b194316e137d4287486fa4ae4d189d079d228559c552562cb2aafea
196 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jacksth.ru/wix?keyword=blank+bingo+sheet+5x5 PDF link annotation
    • https://wopopodixela.weebly.com/uploads/1/3/0/9/130969383/bevazujodod.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/habheXh/poultry_rub_recipes_turkey.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/heqChhv/checklist_template_printable.pdfIn PDF document text
    • https://cdn.sqhk.co/tefupudoma/i4N0yji/45108625345.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/ihNkihB/chicken_invaders_5_full_version_download_crack.pdfIn PDF document text
    • https://cdn.sqhk.co/kamupudoro/tyhfnje/social_detective_app_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_600fe3eb567c3.pdfIn PDF document text
    • https://mirebaxowani.weebly.com/uploads/1/3/4/0/134017623/rosuwepogir_sosefibadinida.pdfIn PDF document text
    • https://cdn.sqhk.co/vunofufi/cTFcP2f/45207452443.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379487/normal_5fff2ab0027c4.pdfIn PDF document text
    • https://novatoful.weebly.com/uploads/1/3/0/9/130969934/4700276.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368474/normal_601f1c3c5cdde.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454052/normal_5fde70b50c8c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473388/normal_5feef8d4396cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386081/normal_5fd63dd960450.pdfIn PDF document text
    • https://cdn.sqhk.co/zarepowake/gcvysZU/silly_walks_gameplay.pdfIn PDF document text
    • https://winulovovitazu.weebly.com/uploads/1/3/0/7/130740324/8458929.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387919/normal_6010990fdd657.pdfIn PDF document text
    • https://cdn.sqhk.co/gexedamej/PhdiiaA/22823610786.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ba4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA4B 5296 bytes
SHA-256: 4ce5a8b6b5a37b983110e3105d0a43371c1cf60b1ce1093b740ff3fce581e30c
font_01_sfnt_off0000cc59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC59 9740 bytes
SHA-256: e72109741a3cabb3c7b1ce96e1819a2375c2394ad8b61dfd6d1d4bcc41232545

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