Malicious PDF — malware analysis report

Static analysis result for SHA-256 92d08798731ae244…

MALICIOUS

PDF

72.2 KB Created: 2021-03-10 17:42:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 7f7b8153d95a5ce2a44a1c6b77d2d425 SHA-1: 9fa32fffb6a65da27cb5b9a7942423d73ebf7634 SHA-256: 92d08798731ae2440bae8d6f4fa34038c366942cbfc43a1183fe9b36fcc14172
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which are SEO-optimized and point to potentially malicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary attack vector appears to be directing users to external resources via a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/award?keyword=abr%25C3%25A9g%25C3%25A9+des+march%25C3%25A9s+financiers+2020+pdf PDF link annotation
    • http://woronari.getenjoyment.net/sunbeam_bread_maker_5891_recipes.pdfIn PDF document text
    • https://cdn.sqhk.co/zarejesorufo/bKIDkvJ/shark_night_3d_movie_download_in_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/dufolatik/Miihfje/67814192338.pdfIn PDF document text
    • http://jotafitosixa.getenjoyment.net/78097595914.pdfIn PDF document text
    • http://suzofovolavuk.scienceontheweb.net/naduni.pdfIn PDF document text
    • http://rowaxamapitowej.getenjoyment.net/17708744585.pdfIn PDF document text
    • http://tojuvapemupo.mywebcommunity.org/2183469952.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/satuja/77572877864.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/kitivad.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/latosofogokuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21dbf1b1-85ec-40fd-a6e0-5123e79c78ab/how_to_string_a_barnett_vortex_bow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab5c2292-4109-4a78-9d7c-3b9490aa9961/bazevisesewitononuka.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/help_informatica_rivoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c7fdc87-cb04-4746-9daa-e4f259840f3a/23413751897.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/civil_engg_objective_questions_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/26439274785.pdfIn PDF document text
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_e56f69b1639240988b40b4968f14604b.pdf?index=trueIn PDF document text
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_eee30fa46c4a4c1086c78498277ab22e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a588afb-49e6-4a82-ac99-d13862d1d2f7/xefumojewedewazidofobud.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_off0000d966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD966 6084 bytes
SHA-256: 4a6c7c07cff096f176460095b694245e9ca153dd88bc45b59195626aabd625b0
font_01_sfnt_off0000eda5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA5 10884 bytes
SHA-256: 04bd560c0ad848f3f58b18c3de697a5a513c98f76ed00ce73273b1f82fb3c0ec

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