Malicious PDF — malware analysis report

Static analysis result for SHA-256 027ec1f069567211…

MALICIOUS

PDF

133.5 KB Created: 2021-03-18 07:17:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 0c3d837b46107c889eabc15c77ff8860 SHA-1: 1f1914fee9ced8fb3940165013d301c6f5cb3cbf SHA-256: 027ec1f069567211db1bfe82735ca8c55d20b9a77f8e041e2885491ea04f911b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high concentration of links pointing to disposable hosting and link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common phishing lure, likely leading to a credential harvesting site or further malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/wix?keyword=%25D9%2581%25DB%258C%25D9%2584%25D8%25AA%25D8%25B1+%25D8%25B4%25DA%25A9%25D9%2586+%25D9%2588%25DB%258C%25D9%2586%25D8%25AF%25D9%2588%25D8%25B2+8.1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467273/normal_602495e524238.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368745/normal_6044fea21d067.pdfIn PDF document text
    • http://vaxenovutejuzid.sportsontheweb.net/java_8_lambdas_richard_warburton_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408873/normal_5fca274da125f.pdfIn PDF document text
    • http://kiruvoxexuk.iblogger.org/wazibizowipafadutov.pdfIn PDF document text
    • http://lobuzef.iblogger.org/91622954231.pdfIn PDF document text
    • http://vuxijagodoku.22web.org/how_to_become_a_registered_mental_health_social_worker_in_australia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445573/normal_5fe3df94d2fb0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sanuranivewozos.epizy.com/millermatic_135_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/gurisenafinu.pdfIn PDF document text
    • http://pejonoma.epizy.com/gajubo.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/26920076669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0f3d03f-99e4-45fc-8ee3-9ab231d231cf/lord_of_the_flies_chapter_questions_and_answers.pdfIn PDF document text
    • http://kunibenurupamiv.rf.gd/tebovuz.pdfIn PDF document text
    • http://susabumo.atwebpages.com/mercruiser_4.3_intake_manifold.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3538b16d-6539-4a8d-87a3-4918004296bf/agile_estimating_and_planning.pdfIn PDF document text
    • http://xizokokov.epizy.com/51968966581.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001c741.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1C741 35288 bytes
SHA-256: 91cbb25545590e816e14b0c87133b160fa3a0245a4d7b3418cbd8d068d1c7d73
font_00_sfnt_off00017890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17890 4348 bytes
SHA-256: d43b7e1d79cc675745bae0bdd26cafb374e2c1577e76f0d4307ca94fb3fe3f3e
font_01_sfnt_off00018775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18775 10992 bytes
SHA-256: 4ddd2b27f4ff00b5875b19ce247d17a1fcde8850a12b2b88a569821f526c70c6
font_02_sfnt_off0001ad38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD38 17600 bytes
SHA-256: 655efd87f7b8de10061b83aae29e16527ef5830d1b99a89a390b943713d57b03

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