Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6786829fa479f20…

MALICIOUS

PDF

77.3 KB Created: 2021-03-24 09:05:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4718c7c9cf42ae7a2ea7ddc401835ea3 SHA-1: 21e7e5cfcda4d8f2309ad2a32f33409d2beb05b1 SHA-256: f6786829fa479f203ae979c317c19469bd1cd44bc9c601e811d233bba5ef8888
126 Risk Score

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://botokaw.ru/award?keyword=akreditif+nedir+pdf PDF link annotation
    • http://movawizaxaxato.mywebcommunity.org/same_meaning_words.pdfIn PDF document text
    • http://leadtop.co/define_quantum_numbers_chemistryfpa65.pdfIn PDF document text
    • http://agentsoft.space/maluwejutojobawubilautk1q.pdfIn PDF document text
    • http://tunabamilusi.mypressonline.com/list_of_important_countries_their_capitals_and_currencies.pdfIn PDF document text
    • https://bopelesi.weebly.com/uploads/1/3/0/8/130874615/lutijone_wuxake.pdfIn PDF document text
    • https://bupedokan.weebly.com/uploads/1/3/1/6/131607930/65aea.pdfIn PDF document text
    • https://wupirevedog.weebly.com/uploads/1/3/4/7/134709422/dipavaxe.pdfIn PDF document text
    • https://xiruzavaxukegaf.weebly.com/uploads/1/3/5/3/135324830/volezokenawukegu.pdfIn PDF document text
    • http://instapriz.online/94786451883i43fr.pdfIn PDF document text
    • http://jidogirikar.mygamesonline.org/pdf_to_word_software_online.pdfIn PDF document text
    • http://xegazinijitup.mywebcommunity.org/davinci_resolve_17_tutorial_espaol.pdfIn PDF document text
    • http://white-x.fun/45779872224efuhw.pdfIn PDF document text
    • http://rixorevu.getenjoyment.net/32577256925.pdfIn PDF document text
    • https://tevunuxewime.weebly.com/uploads/1/3/1/4/131452804/rorovetibusiw.pdfIn PDF document text
    • http://0fruit.space/firisepiay9ty.pdfIn PDF document text
    • http://fallofelin.online/rajumuwivojimokeroybktl.pdfIn PDF document text
    • http://triple-doska4.club/camera_eyewear_v13_manual0ob7i.pdfIn PDF document text
    • http://reactivaperu-2020.com/what_time_does_fedex_ship_outqiwam.pdfIn PDF document text
    • http://rulabepotinujeb.mypressonline.com/momavu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puribisipup.atwebpages.com/17461077429.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/2014_nissan_altima_factory_service_manual.pdfIn PDF document text
    • http://widifusi.myartsonline.com/26091710259.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/4509572702.pdfIn PDF document text
    • http://vakifavu.onlinewebshop.net/java_tutorial_for_dummies.pdfIn PDF document text
    • http://rigidafavubo.myartsonline.com/jaxubosunoriwavimemanuxer.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_off0000eed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED4 4668 bytes
SHA-256: 97e38541bf7347bf943004bccc644b04a1c406a9c4d3167a8081a7cd7963492a
font_01_sfnt_off0000feca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECA 12664 bytes
SHA-256: 6c741fb6aa5541e13ef8270a78a35696d89e6095343aee19172a94e19a1f9052

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