Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa3d3eb2f4ec667b…

MALICIOUS

PDF

68.7 KB Created: 2021-04-09 14:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ec759e9d49c6e0b74c49b78ad94b1c07 SHA-1: ebffa502a5e0a816f3ea5295fad40e969590d09c SHA-256: fa3d3eb2f4ec667bab8d461f7f51ad71ef92ffd8e7b66fabf6b610c6e819dc02
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 0.9993

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://resalured.ru/strik?utm_term=romans+14+niv+bible+gateway PDF link annotation
    • http://lologunaw.mygamesonline.org/modified_barthel_index_scale.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500910/normal_5fec1d00789a9.pdfIn PDF document text
    • http://fitit.space/zakidoofqsc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387699/normal_5ff4a57751eb7.pdfIn PDF document text
    • http://itwow.info/fort_worth_star_telegram_obituaries_todayx30r0.pdfIn PDF document text
    • http://gafujovinotu.22web.org/xigovorawubujir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425491/normal_5ff56f389f0c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384483/normal_601cb2ed39736.pdfIn PDF document text
    • http://hhizmet.com/simple_literature_review_example2vy3t.pdfIn PDF document text
    • http://1fps.ru/rorivenemikikoql4lj.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/panasonic_viera_television.pdfIn PDF document text
    • http://3gusevshop.space/assi_trendsetter_song_raagsong7p0bn.pdfIn PDF document text
    • http://dokarukaxita.22web.org/xurekasetofegedesokopis.pdfIn PDF document text
    • http://kakorezikudu.mypressonline.com/1435360328.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/accel_world_light_novel_volume_25.pdfIn PDF document text
    • http://dodemul.mygamesonline.org/how_to_do_the_cfop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rosajeku.myartsonline.com/wukewidewam.pdfIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/zapixapodenopezizasiwona.pdfIn PDF document text
    • http://sifebitufol.onlinewebshop.net/little_book_of_currency_trading.pdfIn PDF document text
    • http://puvafimawebeka.epizy.com/vepup.pdfIn PDF document text
    • http://fikelamizogu.myartsonline.com/fidujumodekiwabixi.pdfIn PDF document text
    • http://timawerana.epizy.com/shafarevich_algebraic_geometry.pdfIn PDF document text
    • http://zomudipanosu.epizy.com/vixix.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_off0000cfb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB0 5448 bytes
SHA-256: ed029e292e35bb1d89a457ce4b5c46d8caf1e56f1f543a79a07be864bf0f5ec5
font_01_sfnt_off0000e252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE252 10544 bytes
SHA-256: 557c9dbc0b712f4205059db73973e6b593a52d2c501526ab5dd284af157a42fb

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