Malicious PDF — malware analysis report

Static analysis result for SHA-256 111c6bf6397c68be…

MALICIOUS

PDF

82.7 KB Created: 2021-03-08 05:50:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5ec2e2ebab6f78b9af147a6db0243e50 SHA-1: d57db33d444d76ae7495148e3efe619295f837be SHA-256: 111c6bf6397c68bea964edb73609c3eab55828fea4eddfbfd2515e8f74a90912
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable or suspicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xajibur.ru/strik?utm_term=how+to+landscape+along+side+of+house PDF link annotation
    • http://scm03.ru/intermediate_accounting_kieso_ppt6ka37.pdfIn PDF document text
    • http://znakomstva69.space/28723022272xvj1i.pdfIn PDF document text
    • http://alcexpress3.xyz/87607895868wze96.pdfIn PDF document text
    • http://leomannapov.com/xezitakarevirekuyfvui.pdfIn PDF document text
    • http://kyukty68.xyz/how_to_make_remote_buttons_work_again2g6d3.pdfIn PDF document text
    • http://erogan-oficial.site/66854523449zznaz.pdfIn PDF document text
    • http://6gusevshop.website/xosirokabekabelavekuwofo9t6v9.pdfIn PDF document text
    • http://jusapp.club/254090035722z9o4.pdfIn PDF document text
    • http://ig-objectionform.com/vexomajiluxevowevotinole5i1rv.pdfIn PDF document text
    • http://todayshop.website/skyrim_se_load_order_exampleg1zd9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5871ffbd-359e-415e-be88-a71328366f31/rorisup.pdfIn PDF document text
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_8f0c60c8170146b1b42d3790fe088082.pdf?index=trueIn PDF document text
    • http://somujewod.rf.gd/heres_negan_book.pdfIn PDF document text
    • http://duxuramubot.epizy.com/helen_keller.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa6ebeab-5775-4586-b6a5-87230f19a4d1/48079843801.pdfIn PDF document text
    • https://5efcf519-4c71-4be9-a00f-e1d47ba804c5.filesusr.com/ugd/ebcc4b_87abf3a2980c42a2970b65151598109e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ca26eb6-8e8c-4e99-b01c-2ddf1c08a45a/robin_hood_disney_prince_john_sir_hiss.pdfIn PDF document text
    • https://c2267750-1f6d-4c2f-944a-eb302c7f07d7.filesusr.com/ugd/93971e_94d8a7568a964671985a60beb057fdfd.pdf?index=trueIn PDF document text
    • http://bovinow.epizy.com/daru_badnaam_dj_song_raagsong.pdfIn PDF document text
    • https://cb8582fb-ab29-4f13-bfd4-623ca244ab52.filesusr.com/ugd/d61b30_07189d45a3dd45c898fb2660bbde8e32.pdf?index=trueIn PDF document text
    • https://0f4267a5-27df-427f-b7ff-de3c6d4a4cd0.filesusr.com/ugd/9e4921_6dc64f471fa1481481510ea9d4f1181b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f50765cc-b963-4438-9bcd-12544bbbdea2/lavudexodisobebu.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_off00010565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10565 5376 bytes
SHA-256: 6c14a7dcb96dacf532cc67f08845cc7916d0f256de5ec5618dfec6785898b922
font_01_sfnt_off000117c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C6 10996 bytes
SHA-256: da1c22e4e5588d3f706560e0c2099ed10237a162fd873ba555daed1cae8625f5

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