Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4025f1c1514d620…

MALICIOUS

PDF

64.4 KB Created: 2021-02-02 20:42:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: edc1eb42e5d65192b1ef782a489b7550 SHA-1: b6972e45020e56975b6742ed2760907bb3db9c3d SHA-256: e4025f1c1514d620516b2a1805ff4cf9bdb71a11e10bd369a35f2ebe351907f4
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=the%20cask%20of%20amontillado%20pdf%20in%20spanish PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4391907/normal_5fe3a0da76414.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407724/normal_5fe5d7ff9e1d3.pdfIn PDF document text
    • http://piter.store/zedidoroxelejobifix2r3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385614/normal_5ff3e305eb9cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414172/normal_6010cba4d50cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420240/normal_5fd8141559ae3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447464/normal_60081c0565e77.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380536/normal_5fc71b48361cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458412/normal_60112b14c541f.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/jbhexAA/69034747751.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/ehdggjq/vorixisanajababawixe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444114/normal_6010cfd843340.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378149/normal_600b7204464b7.pdfIn PDF document text
    • https://cdn.sqhk.co/fugolamudara/Cgg0idW/paypal_credit_score_requirements.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/masevewi/lysistrata_themes.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_off0000bca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCA1 5312 bytes
SHA-256: fefbb924f2aab5df1a503e67df45b2254e8cdff3f0a72cdad716892170ddaf9c
font_01_sfnt_off0000ce92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE92 11128 bytes
SHA-256: 23317f995d6e4deff7f919b9781b1a7333c33d492b9d4ec94156b310da1cddf5