Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e06aad1c15be9d…

MALICIOUS

PDF

79.4 KB Created: 2021-05-26 05:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 06c8b6d7a029291779bc9c78cea27cf9 SHA-1: 70810b44a12165ba257b584c70dec52a5eb64b86 SHA-256: 24e06aad1c15be9d5a7f0a316fda2e907bce18ee7bd217191b06e368d753bc31
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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://seumenha.ru/strik?utm_term=top+10+rebound+leaders+in+nba+history PDF link annotation
    • https://zanomegujinax.weebly.com/uploads/1/3/4/8/134873542/653b54bd4af4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497697/normal_5fdc8da4bd223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408355/normal_604ed83929823.pdfIn PDF document text
    • https://rifitozimolumi.weebly.com/uploads/1/3/4/6/134667823/vugemunupi.pdfIn PDF document text
    • https://sazunanu.weebly.com/uploads/1/3/4/5/134596286/timoxixokugaretiwi.pdfIn PDF document text
    • https://gukejokofa.weebly.com/uploads/1/3/0/7/130739315/vifoxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470839/normal_60653cf94c200.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/pozokimepe/indiana_weather_report_10_day.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/kenmore_elite_gas_dryer_fuse_location.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/89794939422.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/77603815822.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/xovotax.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/67834376120.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/vimowirepozepumifatu.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/game_commandos_strike_force_full.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/66744889406.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23e75466-0fed-4492-9cac-d11c329656a5/how_calculate_cost_of_production.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/sinini.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/felopisitefin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab4274f4-a2c0-48ee-9f5d-dacf1152b994/43038757361.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/59363196179.pdfIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/27169679540.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72388f57-3a9a-4dde-9329-43224c01c3cd/62969080805.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10bf549b-97c9-4ade-821d-72c61cd4da8e/ninotolexasos.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_off0000f8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FC 5432 bytes
SHA-256: ce74918ba180fbdbb3601330d55705e3ca29f43d21b25a2a4b40da2a8b17fafc
font_01_sfnt_off00010b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6F 10712 bytes
SHA-256: dcbb23cf19124ffae4cb38ebb5a80f4cd772b9d79a5c837556943dfde05dbb87

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