Malicious PDF — malware analysis report

Static analysis result for SHA-256 2beb33c415940f66…

MALICIOUS

PDF

76.2 KB Created: 2021-05-15 06:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 888b43964991632697c512ff3a51e4f6 SHA-1: 914ad3761c601cea9a0812e6d30f92bb22b80b93 SHA-256: 2beb33c415940f6622e620820201c937746beea33ac7c302c7eb8cbaec40cb26
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 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/strik?utm_term=craftsman+30+inch+lawn+mower+blade PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474448/normal_601fbcb6f1bf0.pdfIn PDF document text
    • http://dvertsoff.ru/74511334086mb4b1.pdfIn PDF document text
    • http://honbiz.pro/dell_latitude_e6410_keyboard_price_india8zh70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486353/normal_6006177cc91e6.pdfIn PDF document text
    • http://bigpleasure.ru/66977257617mjtcx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426090/normal_5fddfa903daf4.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/voltage_divider_problems_with_solutions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474223/normal_6054cecf1dac5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6d428a25-da86-44fa-8f13-5b0f09742281.filesusr.com/ugd/3649d2_433d625c190944ecbb56592b919234b3.pdf?index=trueIn PDF document text
    • https://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_277582e969184f7b913713dada662940.pdf?index=trueIn PDF document text
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_b3c2cdd61f5a4e5a9b7babfdf9a07d1c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a92eaca-d8eb-4054-b809-336a2ae38dec/vubafilokos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a063453a-0a07-4602-8688-0961c236b70b/officejet_pro_8610_ink_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e20c61d7-307a-4c99-b72a-9295e3b260a9/nodozimaxeg.pdfIn PDF document text
    • http://magegefopo.atwebpages.com/advanced_excel_course_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/pioneer_deh-3400ub_wiring_harness.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/004d21fe-e4fc-4f69-91a1-478395cb2c36/business_analytics_courses_in_canada_colleges.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/zebigox.pdfIn PDF document text
    • http://zegetafirotazaz.atwebpages.com/2004_honda_civic_factory_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/dacian_gold_limited_annual_report.pdfIn PDF document text
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_ccaa1e07052e4dabbba0241b07e4b9c1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/61522302701.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/school_dashboard_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae60ecd1-dee8-4eea-ab0b-c5340db88d76/burawu.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_off0000eafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFC 5704 bytes
SHA-256: f7988ccf2bb75fb8c3c7dd6dd139a7c30afbedffbd22a9430745879bfe97ff3c
font_01_sfnt_off0000fe49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE49 10996 bytes
SHA-256: 47d8203b2e8c32e1b593fe4de32dbc81c502aa4b03cb0b4a5f78ea6e9dc41f59

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