Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a0a7158c37cb118…

MALICIOUS

PDF

70.2 KB Created: 2021-02-17 20:07:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: ec1b2558971efb48be82f47cf8a89bca SHA-1: d1bcee9489da6833f56ae5ae0d069b1000414f1e SHA-256: 4a0a7158c37cb11868cdf294363fe50543458cdbf62b6d1b211b0708b4978f7f
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/wb?keyword=division%20with%20place%20value%20disks%20worksheets PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464877/normal_5fd1d84babe38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496818/normal_601e4bf594565.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483354/normal_5fc601352fc83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485321/normal_5fdbc3c4343ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392877/normal_60114c1c4d9e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410985/normal_5fdb0e5e8d49e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505102/normal_601b527da417f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417329/normal_5fe0f8000cfea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403824/normal_5ffc780db51b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427105/normal_5ffe52d49c8bc.pdfIn PDF document text
    • https://xapenivivafozeb.weebly.com/uploads/1/3/1/3/131379266/gisuledufulevokusaxi.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/fatisake/wefewatisumu.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/pulmonary_fibrosis_exercise_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/51795842657.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/netflix_mac_reddit.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_off0000d5ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AC 5376 bytes
SHA-256: fa2020b1ca19b309d3f14c55a6dc0017674190aba6657e5030d3ea362b466e9a
font_01_sfnt_off0000e80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80B 10544 bytes
SHA-256: 26f29fca18bf6bda122077c65cd29b262790440f3e2377ae2f31022ce4d81b9b