Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5b20ad873a216ca…

MALICIOUS

PDF

76.4 KB Created: 2021-03-05 04:41:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0a30fd7010a14e51d9ff53b1be9cdf09 SHA-1: b757a7f09deca598e4824e1f8faaea951a643e92 SHA-256: b5b20ad873a216ca722e4261c16df6605d8d5553e2b8077096dc445e7394af60
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9995

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://lozipotod.ru/123?utm_term=how+to+read+a+tarot+spread PDF link annotation
    • http://kelnoteres.xyz/chennai_map_hdbc9pb.pdfIn PDF document text
    • http://nat-yoga.space/9133583890537965.pdfIn PDF document text
    • http://artistichomesolutions.com/lenovo_ideapad_320_amd_a9_reviewn6bhv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486550/normal_5fec9548c4393.pdfIn PDF document text
    • http://forpost-electrica.ru/john_deere_z425_engine_replacementb0od0.pdfIn PDF document text
    • http://fidofawi.medianewsonline.com/lyrics_to_cant_stop_the_feeling_justin_timberlake.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464077/normal_6024b84e2c159.pdfIn PDF document text
    • http://slmit.space/pubiromuf3xwvy.pdfIn PDF document text
    • http://shtangelkipokupkiitd.online/to_kill_a_mockingbird_book_reviewmt0qb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378160/normal_5fc944d15b71a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414498/normal_5fe3570f020f1.pdfIn PDF document text
    • http://nenonazuf.scienceontheweb.net/solid_state_electronic_devices_7th_edition_solution_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419410/normal_601afe19d3196.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/zesixefe/aggregate_reports_in_pharmacovigilance.pdfIn PDF document text
    • http://sajatuvireguta.atwebpages.com/power_electronics_a_first_course_solution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bdb7eb0-a70b-4cea-a878-996a0fba6967/python_learning_book_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80f20fdd-fd8c-4974-bbf8-7e04ec026017/spelljammer_3.5.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/39029917593.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/ada_parking_spaces_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/53926666445.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24d6f219-62e1-4118-b81e-bcf3e90d916d/unit_circle_6_trig_functions_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/pinenafebusobijiwedezex.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_off0000eff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF7 4976 bytes
SHA-256: d18a55374b9bacb90ff509146451a8ea80f4d30ac44c4cf4e3f5ff309208e961
font_01_sfnt_off000100fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FE 10344 bytes
SHA-256: 58ae5352fd52e7935f1dd67ba14fad1ed66b9fb3b3c083ab016a70518eb09a52

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