Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d25329300b2fe7…

MALICIOUS

PDF

74.6 KB Created: 2021-03-15 09:53:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 63992a911bdf43a165953ed75eda9cd7 SHA-1: d747a3cabf90bd4d11b042cc9b066463a37ca0e1 SHA-256: 12d25329300b2fe7dca1415840b6081434b63bd2bacf67ab9a6cb16bebbacb24
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/wix?keyword=pigpen+code+generator PDF link annotation
    • http://birobupalojasux.iblogger.org/2019_movies_tamil_hd.pdfIn PDF document text
    • http://setofexperience.site/kenmore_dishwasher_repair_youtube0fkwd.pdfIn PDF document text
    • https://tupirusu.weebly.com/uploads/1/3/4/7/134702138/nanopejudetiz.pdfIn PDF document text
    • http://paxenazubenib.mygamesonline.org/ignou_assignment_front_page_download_2020_19.pdfIn PDF document text
    • https://vujojetusifej.weebly.com/uploads/1/3/1/3/131398487/9108914.pdfIn PDF document text
    • http://1xbet-regi.site/35164751089jad81.pdfIn PDF document text
    • http://mrshadow.net/are_dividends_recorded_when_declared_or_paidgdnlb.pdfIn PDF document text
    • http://geparup.scienceontheweb.net/apes_textbook.pdfIn PDF document text
    • http://walolexokesufa.sportsontheweb.net/zepujokesusa.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/school_the_story_of_american_public_education_summary.pdfIn PDF document text
    • https://wozukaziximuru.weebly.com/uploads/1/3/4/5/134587045/5319713.pdfIn PDF document text
    • http://fruit-italy.space/microeconomics_in_modules_3rd_editiongxgdf.pdfIn PDF document text
    • http://golixudib.mypressonline.com/benim_hocam_ders_notlar_2020.pdfIn PDF document text
    • http://differencecheats.net/sword_art_online_progressive_anime_releasexxpwn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vugugemo.atwebpages.com/ielts_speaking_actual_test.pdfIn PDF document text
    • http://sojizodujibibo.epizy.com/joxijekujumexojaf.pdfIn PDF document text
    • https://18cceff7-6d50-42ec-9d85-67184b61345e.filesusr.com/ugd/8c2e83_24d3116baad041ed80f4ca8bc11a746c.pdf?index=trueIn PDF document text
    • http://fogafixajusel.rf.gd/kejirenomuvovezi.pdfIn PDF document text
    • https://e60c805d-b9e1-47fc-b045-983511e9ac1f.filesusr.com/ugd/116bb2_76b6153743e546e4a1c985ca9953dc64.pdf?index=trueIn PDF document text
    • http://zavulelobawabi.onlinewebshop.net/73080062497.pdfIn PDF document text
    • https://e791dc30-71fd-4519-a75e-453748eb9c32.filesusr.com/ugd/8a5fcf_2c169b19625340cea4e3ef0cb1633c18.pdf?index=trueIn 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_off0000e5c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C0 5032 bytes
SHA-256: 851df78e4fa7c342985e061ffe348450422b43480248c66719de0c7504296893
font_01_sfnt_off0000f6f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F2 11184 bytes
SHA-256: 296a342f5f3eb3a787b7cdb8209e8a9945750679696ca6417c8b65b7bfbba368

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