Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd4062b7f1b90e7e…

MALICIOUS

PDF

71.2 KB Created: 2021-03-20 13:12:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6eaa98ccabcb03fa853a5fd373ce51dc SHA-1: 9b9b0d35c077778d0897704db4d54c8af9cd9f6b SHA-256: dd4062b7f1b90e7e5e6fa40f2303c408d11fd33dd00a2bd39b5831627eee7069
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://bologen.ru/award?keyword=circulatory+system+worksheet+pdf+grade+5 PDF link annotation
    • http://sifisomatexow.sportsontheweb.net/zasapokubaki.pdfIn PDF document text
    • http://lorakuze.sportsontheweb.net/tijowo.pdfIn PDF document text
    • http://mevesepegubisis.scienceontheweb.net/fezujewis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474169/normal_602c74a74748b.pdfIn PDF document text
    • http://warewakeb.sportsontheweb.net/kobefu.pdfIn PDF document text
    • http://kefojixesopu.66ghz.com/omnisphere_2_lowest_price.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476783/normal_5fe3a9d648a4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420238/normal_5fee42d6d8a85.pdfIn PDF document text
    • http://pixidilivutep.medianewsonline.com/45906829812.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/los_rios_de_color_purpura_2_dvdrip_latino_mega.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426424/normal_601edb12dc5ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sevawudefogu.rf.gd/navy_seal_museum.pdfIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_7f25c4adbcdf4371818393c5b20c4009.pdf?index=trueIn PDF document text
    • http://konivad.epizy.com/does_none_take_a_plural_verb.pdfIn PDF document text
    • https://75edee45-cd08-43cb-a752-0c33e5c2343f.filesusr.com/ugd/a7c173_3ee0005faccc4a44b989644d2100bc9b.pdf?index=trueIn PDF document text
    • http://bebovufuvuji.myartsonline.com/ms_access_2007_tutorial_download_free.pdfIn PDF document text
    • https://3c3b6f52-20a2-448a-be11-eec5930c502f.filesusr.com/ugd/0ca786_cb2eb41c9d72420f9140fd5ddcb95ef7.pdf?index=trueIn PDF document text
    • http://xogijowag.onlinewebshop.net/17532515067.pdfIn PDF document text
    • http://sugunava.epizy.com/83640488512.pdfIn PDF document text
    • http://raselitabak.epizy.com/35754682426.pdfIn PDF document text
    • http://gepivefukusi.atwebpages.com/wavoxafilogom.pdfIn PDF document text
    • https://4bdeaa70-5336-4456-9086-62b410dce254.filesusr.com/ugd/f9d4cd_162712db619f4f6d8eb04ac76d71bea9.pdf?index=trueIn PDF document text
    • http://dubanexotokegel.myartsonline.com/gst_full_information_in_english.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_off0000d7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E8 5856 bytes
SHA-256: c799836e8f5dad0ffd37065920155227d48402f247f38ce2dadd05447aaf2d25
font_01_sfnt_off0000ebcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCD 10440 bytes
SHA-256: 86c6ef5c198489faefe584d6225befe1dc65a9a054d628c35e042cdcf728004b

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