Malicious PDF — malware analysis report

Static analysis result for SHA-256 67eb2148403e7c80…

MALICIOUS

PDF

68.5 KB Created: 2020-11-25 10:31:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 52e00337e75c24d119a57365fae46802 SHA-1: 7e5140be47fad5c4704b0ed04c7497560ecc5c98 SHA-256: 67eb2148403e7c802215e33640716a41814b7c979cdc2aa618c24020162b5429
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/wb?keyword=centralized%20vs%20decentralized%20information%20systems PDF link annotation
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/2bb9ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408992/normal_5fa5f6a603652.pdfIn PDF document text
    • https://dajetulanew.weebly.com/uploads/1/3/4/3/134309067/9bb005ee52286d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454820/normal_5fa0856587645.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450244/normal_5fbdc1e264a4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375698/normal_5f9a420421640.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454558/normal_5fb2fe7722704.pdfIn PDF document text
    • https://laguvibokabab.weebly.com/uploads/1/3/4/3/134383318/1395406.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/kofabube/letter_sounds_worksheets_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/monakopuvikusenilo.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/lugaguboxidif.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/vafodigovoroxasiwip.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/73550298964.pdfIn PDF document text
    • https://s3.amazonaws.com/damevusom/a_blessing_in_disguise_idiom_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/difference_between_assembly_language_and_machine_language.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_off0000cfa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA6 5284 bytes
SHA-256: e9e628aca76ab6823c7dae3262114fbf2d0e88d276a60c7c2cffbe3fae8d1ed8
font_01_sfnt_off0000e19e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19E 10332 bytes
SHA-256: 3fc186afe737a6d76d273508d37df22b8145050a1b0f88e7263ae9d83cbca491