Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3d1ede6b47c90fd…

MALICIOUS

PDF

74.3 KB Created: 2021-02-27 06:31:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: a0cb111861b1fc7bed85f0a74d7b9389 SHA-1: b91949092a0620ac84b0f4c63d426ba362fc93fb SHA-256: a3d1ede6b47c90fd5cfdb8ecdd5a9a1463706a5622ba14dc715e807aa2837bde
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://kuzutuzo.ru/award?keyword=factored+to+standard+form PDF link annotation
    • https://lukazerud.weebly.com/uploads/1/3/4/3/134343231/rixud-mitezit-ginaxavisopa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466146/normal_601c7d9a247a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393349/normal_601b442448662.pdfIn PDF document text
    • https://wukarogokemek.weebly.com/uploads/1/3/0/7/130739107/xamapenebed.pdfIn PDF document text
    • https://vaxejoxumede.weebly.com/uploads/1/3/5/3/135346770/4285864.pdfIn PDF document text
    • https://tasoxagizuj.weebly.com/uploads/1/3/4/7/134734804/1742079.pdfIn PDF document text
    • https://cdn.sqhk.co/vatuliwa/UEkRicv/popular_french_music_artists_2020.pdfIn PDF document text
    • http://wapividazofar.scienceontheweb.net/44761782257.pdfIn PDF document text
    • https://todatotosikuped.weebly.com/uploads/1/3/0/7/130740429/sarixugomebur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496586/normal_602793d99ca67.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vujapoguxesak.myartsonline.com/96574950266.pdfIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/tanusemisoz.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/bunobowopelitafogapuxelit.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/sonda_vesical_enfermeria.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/akbar_s_manchester_menu.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_off0000e40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40D 5088 bytes
SHA-256: 7bd6e996a198b49ea103747db79c16fd48e8fb5726e35da39eac89c66594fbce
font_01_sfnt_off0000f543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF543 11064 bytes
SHA-256: 0f27e22c83419b63a72d1da74bd2fbadab96631c20014c372b9d0a8eafdc2e6f

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