Malicious PDF — malware analysis report

Static analysis result for SHA-256 79076d1194d7ae65…

MALICIOUS

PDF

70.9 KB Created: 2021-01-08 07:16:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ea2e208b3a2074f6fd227c7d10ab584b SHA-1: b25c2e71c8f0c1aace544bbc2f0fe9c4be7731d5 SHA-256: 79076d1194d7ae65a2414bb302747c3880acfeed1571798a7799cc63698f3cba
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/wb?keyword=words%20ladders%20a%20trivia%20crack%20game In PDF document text
    • https://static.s123-cdn-static.com/uploads/4422386/normal_5ff086fd7937b.pdfIn PDF document text
    • https://cdn.sqhk.co/pixanetu/iTgcABR/rinasuju.pdfIn PDF document text
    • https://lagubezawepafu.weebly.com/uploads/1/3/1/8/131856446/nagafa.pdfIn PDF document text
    • https://cdn.sqhk.co/zewezerezi/1Jw2Edd/zevusofijijaxosul.pdfIn PDF document text
    • https://cdn.sqhk.co/golomamone/V01awa2/monster_crafts_food_truck_prices.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388412/normal_5faf41366e9a6.pdfIn PDF document text
    • https://wupuvogobed.weebly.com/uploads/1/3/4/5/134507139/malajijodokixosaxix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487647/normal_5fb67a329f0ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450636/normal_5fe52fc931e04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379736/normal_5f9aad2e7a6ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/73955c9f-2613-4604-bfa7-b3debf6781a2/foobar2000_equalizer_presets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cb57259-1888-4eb3-8a0e-0ecd7bd04215/chapter_2_interpersonal_dynamics_and_communication_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b6b05e0-8182-4e25-b899-a2332bb9a53a/kajixagazosalexaveren.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1349877-a77f-440c-b6ac-00ec32bd8dcc/92943850521.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9371ed2b-8988-4710-830c-3d367d5a6290/fevejusukupogeruzavidubew.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_off0000d989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD989 5396 bytes
SHA-256: 449ac6439fc9722a786d346b4057c55cfb30eb198b8a78763a2af99f73b03f61
font_01_sfnt_off0000ebde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDE 10236 bytes
SHA-256: a0fc116adf904767292ba89968b010ee1c4b8749417d6d985056f0805710f0db

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