Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ec03389874f2a0b…

MALICIOUS

PDF

85.5 KB Created: 2021-03-23 17:21:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 168e459fc302ecd9bc1c567e77ad74b3 SHA-1: 9911694f4c5c30dbf924264e693a38918ecd1a20 SHA-256: 8ec03389874f2a0b4a4c77ff2add65ba0863d5479e91cca5753eedfe490ed2e0
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 0.9997

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://botokaw.ru/strik?utm_term=how+do+i+connect+my+swann+security+to+my+wifi PDF link annotation
    • https://cdn.sqhk.co/wimakebibane/x7giPjB/w3schools_html_form.pdfIn PDF document text
    • http://subbellassecret.com/green_building_and_leed_core_concepts_guider3flm.pdfIn PDF document text
    • http://feyakast.online/teas_test_science_study_guidenkapw.pdfIn PDF document text
    • https://cdn.sqhk.co/nanovinojon/je5jcVT/86634937184.pdfIn PDF document text
    • http://sweetmeet.online/bidoziwoniqvml.pdfIn PDF document text
    • https://cdn.sqhk.co/mokevesin/I8ArjjM/funny_sms_hd_ringtone_download_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwewiwudesi/jjoRQia/daxowifugivenasip.pdfIn PDF document text
    • https://cdn.sqhk.co/mipekakiri/bgdgegj/catchmaster_288i_professional_bug_trap_and_monitor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/28801720456.pdfIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_2e4c61d3c7424a14b4a2ed51b87c1609.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c116e40-8c26-401a-a23d-c2f622689851/vurivixanuv.pdfIn PDF document text
    • http://sakigekoxigukil.epizy.com/evernote_cornell_template.pdfIn PDF document text
    • https://2791e1c6-719d-47aa-bdc5-1556df251b63.filesusr.com/ugd/7757c5_d574da2a7a074149bc198f753c105c0f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/32698f37-f9be-409a-9488-b1202ea17f80/16615110955.pdfIn PDF document text
    • http://kexofiz.epizy.com/beneficios_de_la_lactancia_materna_en_la_mama.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/52884781754.pdfIn PDF document text
    • http://bagirisuteladog.rf.gd/49400165385.pdfIn PDF document text
    • http://duxuramubot.epizy.com/administracion_de_pequeas_y_medianas_empresas.pdfIn PDF document text
    • https://19527f6f-7821-4b33-8e58-d909ab9a203f.filesusr.com/ugd/b18fc6_6950dd880fb84922b744ad0d654be13f.pdf?index=trueIn PDF document text
    • http://javewexo.epizy.com/amma_vanthachu_tamil_movie_songs.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_off00010e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6F 5288 bytes
SHA-256: 9fe8b602f2f985b351c2ffa27d2820f84904fd48b751afeb9f04cd35b07ff2f7
font_01_sfnt_off0001206b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1206B 11124 bytes
SHA-256: 7ba22050a18979cfab84b03f33bd114afa553e08d3a06326dead170bcdcd899a

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