Malicious PDF — malware analysis report

Static analysis result for SHA-256 18fe3daf5e4107a1…

MALICIOUS

PDF

72.0 KB Created: 2021-02-22 11:49:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 78c4f548a614d796a3f53e51eecba018 SHA-1: f384c1d966404661660e10278aa354cf69a23635 SHA-256: 18fe3daf5e4107a120e50f982e17e1731f15699a971394f46393d3e2ae54e80d
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/123?utm_term=how+to+set+a+hunter+sprinkler+controller PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467273/normal_602b0c4a8f090.pdfIn PDF document text
    • https://suxaniwaxunese.weebly.com/uploads/1/3/4/3/134385499/jukusipuzaba_newipuvejali_wijefazasuka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414515/normal_5fcc3ae952c78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381766/normal_601f73302fc86.pdfIn PDF document text
    • https://jeludumekidi.weebly.com/uploads/1/3/2/7/132740852/c69b94c9473.pdfIn PDF document text
    • http://businessmentality.com/school_yearbook_templates_free94m7z.pdfIn PDF document text
    • https://pelabomorifij.weebly.com/uploads/1/3/4/6/134628360/185d9b.pdfIn PDF document text
    • https://silorofolukut.weebly.com/uploads/1/3/4/2/134265947/4859300.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366335/normal_5fefb5962fb75.pdfIn PDF document text
    • https://lemorixumo.weebly.com/uploads/1/3/4/7/134748879/sofatibugiji-nukupujofofeket.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386607/normal_600452b5690a4.pdfIn PDF document text
    • https://zesijedoroge.weebly.com/uploads/1/3/4/3/134372038/b6f18c444c0e499.pdfIn PDF document text
    • https://kaxorude.weebly.com/uploads/1/3/4/0/134095875/97cb1a598eeb31.pdfIn PDF document text
    • https://jaxanotev.weebly.com/uploads/1/3/1/1/131164383/potamibu-kefafo-jawipije-lozonedufodov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464720/normal_5fd1e6c80d9f6.pdfIn PDF document text
    • https://guwubujurod.weebly.com/uploads/1/3/1/4/131438509/vuwukuxele.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419836/normal_5ffc91ef5458f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459166/normal_5fe708b4bb631.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000de8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8F 5136 bytes
SHA-256: f2c2fb8c18442bd9372e84db5ffe99742ed09cd7e84dee9e654a1d9c7387932e
font_01_sfnt_off0000f011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF011 10228 bytes
SHA-256: 611a42b30220d56b51dc4656a8205db05b2e14fc4c1fb3320fe6b157668bcae7

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