Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f69b3a4d4e27a2…

MALICIOUS

PDF

69.7 KB Created: 2021-04-08 02:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1cea4a3066b1ff2e7a6f80263a87c053 SHA-1: 732ca1da8c157583767bf681ec27f1368480a509 SHA-256: a0f69b3a4d4e27a29b6692fb50faecee42d46af8aea93521f9354fa6e400ef10
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 0.9956

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://jottigo.ru/wix?keyword=4.5+prove+triangles+congruent+by+asa+and+aas+answers PDF link annotation
    • http://lanufutado.22web.org/gitakapiwodupukumov.pdfIn PDF document text
    • https://tivepikilusu.weebly.com/uploads/1/3/4/7/134759048/4272485.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463279/normal_5fc8db6859270.pdfIn PDF document text
    • https://sifegofariwe.weebly.com/uploads/1/3/1/4/131437131/sotidazogune.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494149/normal_6033792aea776.pdfIn PDF document text
    • https://jedifubebevaze.weebly.com/uploads/1/3/4/8/134873515/zuborikim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486743/normal_605116c286975.pdfIn PDF document text
    • https://widufosonetorif.weebly.com/uploads/1/3/4/5/134598319/mevebowosenoje.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405895/normal_5ff9f51c10508.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489853/normal_6052d0b825bcf.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/rodiligarexo/aparato_circulatorio_corazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/782b7719-5611-44dc-b797-5bf14f78993a/fleck_5600sxt_64_000_grain_water_softener.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/sizajusukefek.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/57457482331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbe3c351-0461-45cb-98e9-2b78b028530b/tp-link_tl-wr841nd_v7.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/81879605215.pdfIn PDF document text
    • http://gupupofof.rf.gd/what_is_the_purpose_driven_life_all_about.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4f0296f-8003-43e1-b1ef-64a68de8a97f/unix_command_cheat_sheet_vi.pdfIn PDF document text
    • http://jetuloloz.epizy.com/40315768133.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/xugurokewomepogedigoput.pdfIn PDF document text
    • http://pidusuzelaju.epizy.com/bpmx_earnings_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8ed2656-aeac-456c-88af-0a692026fd2b/76120113658.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/the_coming_of_the_third_reich.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/beautiful_birthday_cake_images_free.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/what_is_the_best_french_door_bottom_freezer_refrigerator.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/28338333004.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/lusakexivogogomosopijup.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_off0000d3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B1 5784 bytes
SHA-256: 9ed3043588fb3ccc352116e0f4ca789646656cce7485189fe1072dfdac10331f
font_01_sfnt_off0000e790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE790 9716 bytes
SHA-256: 220b49a54b084b0a303a5aeeeb8c4e575f29224c4197c5afd42c013d09c3eeb5

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