Malicious PDF — malware analysis report

Static analysis result for SHA-256 7667d71901353c37…

MALICIOUS

PDF

70.8 KB Created: 2020-12-30 22:46:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 75fa2a5990ef9d4cd7cff0ca63bbff45 SHA-1: 0510df99dc6c2bafe21c8026d365ee48b586c164 SHA-256: 7667d71901353c37b0ff1bd60a410d5f3387d2b4420202173c7bc90160898edb
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://traffset.ru/wb?keyword=easy%20cross%20stitch%20flower%20border PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450256/normal_5fc28d3c88a77.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401982/normal_5fe2b7a24778f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392472/normal_5f9fcf3fb8fda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485587/normal_5fadcf368be09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416930/normal_5fbd98b9d6cd0.pdfIn PDF document text
    • https://bomejafir.weebly.com/uploads/1/3/4/7/134725936/wexoda.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/8018008.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/lewuli/nagilawowoxub.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/auditor_general_report_2015_malaysia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5f1c632-e15b-4eaa-9646-e9e71c483023/95323381135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5c6f88b-d209-4ef5-b32b-e785c54a918a/writing_chemical_formulas_worksheet_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/458b9453-de77-443b-94ce-86560d3f5283/211227325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ef95c53-a2af-424f-b98b-83a8d43e1032/escape_game_locked_door_and_lost_keys.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/768b7651-6f9d-4f99-9377-c9848e2628b2/fetezewofulasanifovejib.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/fulevijujadiler.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_off0000d41d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41D 5400 bytes
SHA-256: 5296b642f7f1e26eac93a56641772c4bb4ccb25da7f5d1ecff170339591fea94
font_01_sfnt_off0000e68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68D 11700 bytes
SHA-256: 2948d274d3240224c6f2d0ac960c1ed7424bcf56036ff0d9ae0cc25f738e657b

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