Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8c37e9f02f9dd1f…

MALICIOUS

PDF

77.0 KB Created: 2021-03-14 11:51:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1c485eb9446fcef1bbfdff73e1667b94 SHA-1: b15b7d90f8f0d8f408759fdffec97b6f669210c5 SHA-256: f8c37e9f02f9dd1ff47cbfdd2a5378f2fc7b8721d1840ede228ca092321bb8d7
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 0.9991

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/wix?keyword=erosion+and+deposition+by+flowing+water PDF link annotation
    • http://nokojatagi.mywebcommunity.org/pdf_to_word_converter_online_free_for_largest_files.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvomafoda/2hbifNt/nails_designs_ideas.pdfIn PDF document text
    • http://jevakogubosu.22web.org/wositebakafiwuwewep.pdfIn PDF document text
    • https://neverazu.weebly.com/uploads/1/3/4/9/134901342/2399256.pdfIn PDF document text
    • https://motikefivenigem.weebly.com/uploads/1/3/4/7/134709332/91023.pdfIn PDF document text
    • http://mon-cmso.best/how_do_you_start_an_artist_statementx0jms.pdfIn PDF document text
    • http://pubguckazan.com/gijirinaxajidibew5pi76.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/dnLW8hf/snack._io_ranked_mode.pdfIn PDF document text
    • http://xisumagogali.getenjoyment.net/caging_skies_christine_leunens.pdfIn PDF document text
    • https://cdn.sqhk.co/difakezil/0gj8wjf/ally_smash_player.pdfIn PDF document text
    • http://axecheat5.xyz/vagabonding_rolf_potts_amazon9wbc7.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/HYrheje/73928541078.pdfIn PDF document text
    • http://subonus.ru/ferrari_california_for_sale_under_100k3czz9.pdfIn PDF document text
    • http://tabikola.online/singer_6212c_bobbin_casew3lxk.pdfIn PDF document text
    • https://xepevuke.weebly.com/uploads/1/3/0/7/130775471/a2d0af983bf18.pdfIn PDF document text
    • http://pilagapub.iblogger.org/weburi.pdfIn PDF document text
    • http://gedirobidepud.scienceontheweb.net/71701108276.pdfIn PDF document text
    • https://xogowabixebeva.weebly.com/uploads/1/3/4/6/134612916/remofot_wukuwavilem.pdfIn PDF document text
    • https://mewuvirinikupu.weebly.com/uploads/1/3/4/5/134505229/6732084.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/jeux_de_carte_a_32.pdfIn PDF document text
    • http://petizitopebil.epizy.com/crystal_reports_runtime_engine_windows_10.pdfIn PDF document text
    • http://bimekikup.epizy.com/45429158989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f08ab0db-1e07-4c62-8b80-fe412bb0b7db/how_many_kinds_of_poetry_in_pre_islamic_period.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce5d6e97-c2a3-4cd3-a93a-20a4d506ccde/98430971311.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_off0000ef61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF61 5500 bytes
SHA-256: 31c837f7900feb6a82e781798a7104622e9b652f9b2b6e06256fe702f3b339ce
font_01_sfnt_off0001023f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023F 10220 bytes
SHA-256: 1b3591c96d644289697b9be42e8de11ba9dd71334bb623c92afef78e13cc56c1

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