Malicious PDF — malware analysis report

Static analysis result for SHA-256 997bf0ccefac3b58…

MALICIOUS

PDF

63.1 KB Created: 2021-02-18 15:52:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 4cb25360322123f86db060dfd9b2593e SHA-1: d93fa61ad1e29800f58dd04cf6377f52c4d91ebd SHA-256: 997bf0ccefac3b58bb6931f1a1bc082b43e77852e39e39fd213db5253d8f0b6e
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://maypoin.ru/wix?keyword=henry+j.+waternoose+iii+costume PDF link annotation
    • https://vesetiwavulajed.weebly.com/uploads/1/3/1/3/131381055/9f1be9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377938/normal_6018da07d510e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373778/normal_5fdd1e59df8bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421637/normal_5ff07f7c3f04b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367940/normal_5fcaa97fae666.pdfIn PDF document text
    • https://jedexapotup.weebly.com/uploads/1/3/4/4/134472831/gepugiv_pared.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386618/normal_6017114b56574.pdfIn PDF document text
    • https://firedilem.weebly.com/uploads/1/3/1/4/131407958/5353821.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368745/normal_602b84f10e01a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374984/normal_5ffd545b14b83.pdfIn PDF document text
    • https://piwutevuxave.weebly.com/uploads/1/3/4/8/134891910/731192.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470014/normal_60296f76749e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456663/normal_5fefc6788655f.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/bibejovixapis/12867714779.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/ics_100_fema_test_answers.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_off0000ba89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA89 5176 bytes
SHA-256: cfe684cad56c98245c5728962b5bf3138f004df718a467b7c7ae7ee350e12896
font_01_sfnt_off0000cc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC2C 10520 bytes
SHA-256: f5b39b6e4392bcce82db34b131ce4e51a0ff44c214475b6690785459afc60c7b