Malicious PDF — malware analysis report

Static analysis result for SHA-256 f840388286162836…

MALICIOUS

PDF

78.3 KB Created: 2021-03-25 12:12:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0be302a4ae52d9432e3b63f12a4cb391 SHA-1: e2b62b6fcfc4992a1c234f8cb81476c49541cbfa SHA-256: f8403882861628360170daa8a817685ed201c6c2773132b8219c69195f2ae8d6
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 0.9996

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/123?utm_term=sustainability+report+fashion+industry PDF link annotation
    • http://toreret.scienceontheweb.net/basic_design_principles_of_architecture.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459035/normal_5febcc3392748.pdfIn PDF document text
    • http://losmopaka.site/keurig_2.0_k400yh0dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486742/normal_605bbfdbe0f23.pdfIn PDF document text
    • http://witaxolexigabi.mywebcommunity.org/sofirosejulavarikaxovimi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427300/normal_60295b8c3864d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369908/normal_5ff30d578c923.pdfIn PDF document text
    • http://kajuzumanaz.sportsontheweb.net/canadian_citizenship_application.pdfIn PDF document text
    • http://rezanufeku.mygamesonline.org/64587281509.pdfIn PDF document text
    • http://befigter.xyz/picture_books_to_read_aloud_to_4th_gradersmn0wn.pdfIn PDF document text
    • http://discount50.pro/4501740578x4rpd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403406/normal_604d264261592.pdfIn PDF document text
    • http://dkshlyap.ru/how_to_trade_options_beginnerj6okb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gewuruso.epizy.com/xuwanile.pdfIn PDF document text
    • http://xasejumav.onlinewebshop.net/17864876897.pdfIn PDF document text
    • http://navezep.epizy.com/53321581253.pdfIn PDF document text
    • http://fozufafetad.epizy.com/dnd_5e_descent_into_avernus_download.pdfIn PDF document text
    • http://dukedofabi.epizy.com/zilafa.pdfIn PDF document text
    • http://nakeviw.myartsonline.com/salicylic_acid_cleanser_fragrance_free.pdfIn PDF document text
    • http://likewiwojuxus.atwebpages.com/angielski_w_biznesie_swka.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/burenifujirapiv.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/rexixevol.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF230 5476 bytes
SHA-256: 7fea367f9fc6341cd698b7eaa21835bcf77a9e5d11f3efd51134255cb5758b2f
font_01_sfnt_off000104c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C2 11528 bytes
SHA-256: de72699ff56e1a49888d4078d2e95b2e8000ff5b5d9db17321f9c2bdc1916dc4

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