Malicious PDF — malware analysis report

Static analysis result for SHA-256 e606687a9ec8c160…

MALICIOUS

PDF

78.2 KB Created: 2021-03-09 12:03:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2ce628577e53fdd339d2180ce76a54ee SHA-1: 55fa6149a199792539eab4e29fceb7957f8671ca SHA-256: e606687a9ec8c16043c08e073606b1965a8a9075a30e7d73b78b5f01e50dcc50
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 0.9990

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://druttle.ru/aws?utm_term=smc+flex+open+bypass+fault PDF link annotation
    • http://modernstyle.pro/relijonemasekikopus8nnll.pdfIn PDF document text
    • http://zedateve.mypressonline.com/how_to_make_a_puerto_rican_pernil.pdfIn PDF document text
    • https://cdn.sqhk.co/kigoxeni/Mihjaif/23580499483.pdfIn PDF document text
    • https://cdn.sqhk.co/jemitaso/dgciiEI/bonixijokeregefanixagako.pdfIn PDF document text
    • http://podifodosej.scienceontheweb.net/how_much_does_cdl_school_cost_in_oklahoma.pdfIn PDF document text
    • http://probmaka.tech/48601474754jtgv6.pdfIn PDF document text
    • http://gafabotipunofu.mywebcommunity.org/is_vegetable_oil_hydrogenated_fat.pdfIn PDF document text
    • http://mazers.fun/832941736270wr7m.pdfIn PDF document text
    • https://cdn.sqhk.co/lixipadiwel/jeidhhV/neurons_in_the_brain_how_many.pdfIn PDF document text
    • http://reduslim-italia.website/galaxy_a10_review_techradar3ajjl.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/night_owl_dvr_change_password.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/diplomacy_henry_kissinger_summary.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/aditya_hrudayam_lyrics_in_kannada.pdfIn PDF document text
    • http://bewizasosu.sportsontheweb.net/how_to_use_oracal_651_on_silhouette.pdfIn PDF document text
    • http://ninomut.sportsontheweb.net/kaketokom.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/dazuxujepov/latest_android_mobile_phone_under_30000.pdfIn PDF document text
    • https://4b002d3c-a55f-42ce-816c-238f848e88a9.filesusr.com/ugd/3398cc_27f4b3e5d65d42ca853cf77d97630b75.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kigavanus/10737308964.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/8168963137.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/3713721239.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/area_formulas_for_geometry_shapes.pdfIn PDF document text
    • https://6478d21b-237c-41b5-add8-96d7b9819624.filesusr.com/ugd/c7ef1a_a8aad70040c54116891a9d2a74f82024.pdf?index=trueIn PDF document text
    • https://8c285b57-3156-47ce-881b-df665acc117b.filesusr.com/ugd/8d46c2_ac94115588b7486fa7b1b280ef7bfe15.pdf?index=trueIn PDF document text
    • http://gubadif.myartsonline.com/how_to_make_a_negative_person_happy.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE10 5480 bytes
SHA-256: bbfbbddc425c6583949ed8a1e580f2495275e3628ea096dc27d980218434a19b
font_01_sfnt_off0000f0b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B3 10532 bytes
SHA-256: 44fba184fb0bf2bdcb2a1ce94c9548d5cf5a02cbf6e7685f18bdedcf742963bd
font_02_sfnt_off0001150d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1150D 16588 bytes
SHA-256: 12b532bb21eac8288a05aa01a78e35d28e43965d067ed38dba48ada20debf0eb

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