Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7f89a559957805b…

MALICIOUS

PDF

72.2 KB Created: 2021-01-28 06:00:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 6778c6c639777ed77deda5ccbb091054 SHA-1: 6ec29d83a887726bc37923d5a934196b190884b0 SHA-256: a7f89a559957805b04039cc48e12265e0be4b0112511daf7fdf442497f80e0ab
256 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/578070.pdf.
  • 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://druttle.ru/wb?keyword=atmos%20energy%20bill%20pay%20login PDF link annotation
    • https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/578070.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499653/normal_5ff33f178fb41.pdfIn PDF document text
    • https://vozokeku.weebly.com/uploads/1/3/1/8/131857213/5185303.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377115/normal_5ff6789a3535a.pdfIn PDF document text
    • http://winoraama.site/azamara_pursuit_deck_plan_201987aag.pdfIn PDF document text
    • http://unlockdeals.shop/descargar_cantajuegos_todos_los_voluz71bk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450240/normal_5fe039954281d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jobifizokugo.rf.gd/73633564953.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/gutagokogudabejoniveta.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/sofogutofopalufozasobajag.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/zugimegakalifasinexo.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/paisabazaar._com_application.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/pelifi.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/jikanopetenovoxo.pdfIn PDF document text
    • http://nefigubisi.epizy.com/artificial_intelligence_notes_tutorialspoint.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_off0000debe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBE 5368 bytes
SHA-256: af6f5a2fc4f23fcbe5aa19af51283c8fdca5536e3c7e39ee2e465ff72cc47cb6
font_01_sfnt_off0000f0ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EE 10388 bytes
SHA-256: 0530a7ffaeacbccf49f2abc9c2471de4286c124d43883966e1b1c99f3dd396b5

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