Malicious PDF — malware analysis report

Static analysis result for SHA-256 89435ca3d8a38aa4…

MALICIOUS

PDF

75.2 KB Created: 2021-03-18 13:33:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 48a585450de8f98dd13de2baf0fd4758 SHA-1: 81fd074df31ff3c0431d65a3937c946a5bf8e048 SHA-256: 89435ca3d8a38aa4c545b949db3cb4646611d9d190eb02152c27111de7e4ced1
186 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 0.9997

Heuristics 6

  • 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.
  • 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://fokemale.ru/strik?utm_term=garmin+vivofit+junior+3+princess+icons PDF link annotation
    • http://xezixaz.getenjoyment.net/que_linea_de_montaje.pdfIn PDF document text
    • http://com-signto6.xyz/free_powerpoint_cycle_diagram_templatetsdcc.pdfIn PDF document text
    • http://kmikaerfs.ru/muvipixekuxijigs1xn.pdfIn PDF document text
    • http://sowoxapexemex.sportsontheweb.net/7406677460.pdfIn PDF document text
    • https://dizilezojo.weebly.com/uploads/1/3/4/2/134234798/1303768.pdfIn PDF document text
    • https://kazuvamelu.weebly.com/uploads/1/3/0/7/130738637/pegopegeferuga.pdfIn PDF document text
    • https://gugabezari.weebly.com/uploads/1/3/4/5/134577353/da49caf9587504d.pdfIn PDF document text
    • http://1xbet-registr.site/311398142428rppj.pdfIn PDF document text
    • http://itclick.pro/xaxopitugorineziganosivep1p2p.pdfIn PDF document text
    • https://pamaridefudeluz.weebly.com/uploads/1/3/0/7/130776324/3b38cb25.pdfIn PDF document text
    • https://cdn.sqhk.co/rovonoset/gjj4Iwi/pusijipuf.pdfIn PDF document text
    • https://cdn.sqhk.co/kisasizaro/hchf0jg/samufabutumo.pdfIn PDF document text
    • https://dafebifu.weebly.com/uploads/1/3/4/3/134399244/folisekimeworodug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://39dd5e1d-a581-41ec-a80f-9e19245c660f.filesusr.com/ugd/c2656d_c7b3348c7b0c492dbe4a0c63347f9c48.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/756ad1b9-16e0-46ea-b990-18568378ae09/como_hacer_amigos_e_influir_en_las_personas_epub_gratis.pdfIn PDF document text
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_695310c2b55845c89861ec7cb34e66f8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0588851-8420-4e8b-bb9a-f0be1e7771a0/pizitolasobo.pdfIn PDF document text
    • http://wilosokanik.myartsonline.com/ditokezusase.pdfIn PDF document text
    • https://c78ffd2e-fc3d-4272-86ca-968d835fb7ad.filesusr.com/ugd/0f9ef0_73590c41a64f47f6838f5e363861d62a.pdf?index=trueIn PDF document text
    • http://kopolug.myartsonline.com/bafezujofupopexazaf.pdfIn PDF document text
    • https://16564176-4c62-44d7-82e3-1dea6b832d73.filesusr.com/ugd/5e57cf_90fbd29f99ea4d909584c7391c0112da.pdf?index=trueIn 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_off0000e610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE610 5460 bytes
SHA-256: b1afd2bba734f7a0df13b15e31d2986cfa31943cc5b7ba541cdf352b5f4cd8a5
font_01_sfnt_off0000f89f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89F 10792 bytes
SHA-256: cba5b384798e3f421e57c106cfa7456181f7837d052f811fed85309bb23856d6

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