Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b570570261f4217…

MALICIOUS

PDF

67.8 KB Created: 2021-03-03 09:54:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b34becd85ff34430e2a1f8e8a4acf20d SHA-1: 2c40060915777b71c48c132e25cc25b1256071d6 SHA-256: 4b570570261f42173836f197f4f8e0ca1e7d1923073299c5d37100a2a905b06b
194 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
  • 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.
  • 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/wix?keyword=cooks+corner+wenatchee In PDF document text
    • https://static.s123-cdn-static.com/uploads/4465914/normal_600530e0c41bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505837/normal_5fdc6dafc23c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412757/normal_5fe5307197b29.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/multiple_intelligences_gardner_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456143/normal_5fe801cc6e480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369508/normal_5feaed9e12b4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490377/normal_5fd68bcacef5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393186/normal_60341cd8f3eb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379723/normal_60202c15a82f7.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/zalisujezajaje/newegatosixewufagu.pdfIn PDF document text
    • http://kufekisawisewo.onlinewebshop.net/wazafad.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/towosewujujililuregifuj.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/69491717449.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/short_case_study_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/gajuv.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/88744414159.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/1476112611.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/6041213118.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_off0000ce34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE34 4916 bytes
SHA-256: cfe34dc6586e8c58b68fe01f61f739dad3714c5ad27f79072a70337bc504b69f
font_01_sfnt_off0000defa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFA 10300 bytes
SHA-256: 8999d67995186eddfb51b093ea51770b51623f60274eee362eff911fc97b7500

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