Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b74a576c4066f53…

MALICIOUS

PDF

65.4 KB Created: 2021-02-06 08:44:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 01c0ff0bee97c6efaffb900df815b0f0 SHA-1: 158f3ecf63fb2f3583a2d687cac66f8f099efd0a SHA-256: 9b74a576c4066f53198bcf800f69dcf4e6a455fe757bfe148884aeecb8b45afc
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/123?utm_term=twas+the+nizzle+before+christmizzle+cotton+on PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408875/normal_5fed172871a49.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411694/normal_5ff3afca761ac.pdfIn PDF document text
    • https://cdn.sqhk.co/lakuxezaj/MK5NAhi/46262548874.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371800/normal_5fcb5abfa965a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366319/normal_5ff94abdd455b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465703/normal_601256952df81.pdfIn PDF document text
    • https://terodovob.weebly.com/uploads/1/3/0/7/130776228/bedunonida.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369503/normal_5ffb5cc4ab60a.pdfIn PDF document text
    • https://wowererifawop.weebly.com/uploads/1/3/1/3/131384429/6055225.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/vesubodufisi/vemafogabijevulobororasew.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/monster_hunter_shara_ishvalda_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/gugagikizivunekimobul.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/72293735661.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/widuma.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/79712774773.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_off0000c060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC060 5352 bytes
SHA-256: 684cc5470209afdf6a3bd06f7c15e772a98554449a375857f188f87a10b69765
font_01_sfnt_off0000d286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD286 11176 bytes
SHA-256: 25a4beb8add969583f33ea089b06608ef57a0e14a21a54360de1777d949d2e4e