Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ed6e63b6f00edc…

MALICIOUS

PDF

129.2 KB Created: 2020-12-17 06:43:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 06376b6e244d36d474b1b51ec1ba9471 SHA-1: bdc485b0bfb2aa765c2ffb02064453800a0173e0 SHA-256: e5ed6e63b6f00edc2974bfe7a072a7d08f968d098268c045fc000854e4a1a13f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm designed to manipulate search engine rankings or distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of numerous external links is the primary indicator of malicious activity.

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
  • 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.
  • 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://trafffe.ru/123?utm_term=los+10+mandamientos+y+su+significado PDF link annotation
    • https://sugulidan.weebly.com/uploads/1/3/4/5/134508933/e9df0b6f03deda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427783/normal_5fa9befe256e2.pdfIn PDF document text
    • https://kawififelotus.weebly.com/uploads/1/3/1/4/131437833/rupegepakopowavexati.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382784/normal_5f8e59c08f68d.pdfIn PDF document text
    • https://jifilebipik.weebly.com/uploads/1/3/4/3/134375607/wirizigamofew.pdfIn PDF document text
    • https://nokiziwevapof.weebly.com/uploads/1/3/4/5/134507241/komejigiforolon_zazodajupulefit.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/1d44b872.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/sugowubuf/puvake.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e92c12facd59cead07a1/t/5fc6a3d5e6d49a06bb7d4f7b/1606853589780/75109155208.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/jevefexiguferekasikipata.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/paliwimotewar.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/70560049024.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/riwajejufiwazumoref.pdfIn PDF document text
    • https://s3.amazonaws.com/gajejasa/pinunixijeraki.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/formaldehyde_polymer_with_chloromethyl_oxirane_and_phenol.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_off0001bd29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD29 5452 bytes
SHA-256: 35526ba3ca5c796ee6ed933d7efbdf9d64315f6edcee46f7d787059697d354ad
font_01_sfnt_off0001cfb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CFB9 11564 bytes
SHA-256: 0245484f6ccbf38e3f7ac56b3a3c3af7ec4a1eff7000ba7fd442c0cff95df4ed

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