Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a92879aeffe39af…

MALICIOUS

PDF

67.2 KB Created: 2021-02-23 12:15:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5d4990b6f3b0d63628697f0e9da235b8 SHA-1: 5871c5fc753f48178ddbde918d8ef69a2064fcd9 SHA-256: 4a92879aeffe39afe7580a5c9b39aee9f397999b3df2d2323022f5584173d882
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://jottigo.ru/aws?utm_term=us+military+field+jacket+liners PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4423155/normal_5ffe480104c40.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/e3MitMZ/68578297149.pdfIn PDF document text
    • https://bajorenurelop.weebly.com/uploads/1/3/0/7/130739037/gidogonupug-dojivojet-tonelowuwugo-kanuziko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366666/normal_5fceb4b862d0b.pdfIn PDF document text
    • https://notaxivarem.weebly.com/uploads/1/3/4/6/134633458/6275060.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470821/normal_5ff982b3ac46a.pdfIn PDF document text
    • https://zosifoke.weebly.com/uploads/1/3/0/8/130813504/08ad17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410206/normal_5fed3818833f1.pdfIn PDF document text
    • https://buwotudotep.weebly.com/uploads/1/3/1/6/131606539/7130085.pdfIn PDF document text
    • https://moxuvobojivoz.weebly.com/uploads/1/3/0/8/130873852/5199174.pdfIn PDF document text
    • https://robigatif.weebly.com/uploads/1/3/0/8/130873787/tefejunisifipesike.pdfIn PDF document text
    • https://fetepidema.weebly.com/uploads/1/3/4/6/134684810/7645934.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455194/normal_602f156f5f6ba.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/damerirazib/marketing_executive_resume_template.pdfIn PDF document text
    • http://lumajenav.epizy.com/kimipi.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_off0000c73a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC73A 5400 bytes
SHA-256: 0e3a996a657162094187f76a23731bcebbf8094c099ce1f2aac72f0820e2c1d4
font_01_sfnt_off0000d995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD995 11340 bytes
SHA-256: e56de5f9b2583991008d6e644bb973465cb22ee68b7e5f6fb91079ff41687f01