Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dc20e096c6d405f…

MALICIOUS

PDF

83.5 KB Created: 2021-03-15 16:36:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6ba1a7878396f019cd01ce6deef53769 SHA-1: 84f365018acc2ba1e237eeb2a42e3475f76bd27b SHA-256: 9dc20e096c6d405f4b1ba21160ba53bdce88933383924efc2c38d6e80b325494
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9992

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/wix?keyword=delta+math+answers+algebra+1 PDF link annotation
    • http://marketop.club/991729833929pfmp.pdfIn PDF document text
    • http://gaydating.world/kidney_coloring_structure_of_the_nephron_answersc7oql.pdfIn PDF document text
    • http://tryraisins.pro/english_alphabet_chartncuh1.pdfIn PDF document text
    • http://instapodarok.site/art_of_war_legions_best_legendary_heroflvdx.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/bejexe/how_to_write_an_essay_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/dojufufelanina.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/48774031040.pdfIn PDF document text
    • https://7f993087-45f6-41f4-96e5-9dcaca18fb91.filesusr.com/ugd/9a92dd_e66574f84bd8454f82dbcc67de7417e8.pdf?index=trueIn PDF document text
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_7d544014638e4ed0a2de309142e8ab37.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/logofetutenu.pdfIn PDF document text
    • http://susabumo.atwebpages.com/jitukiv.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/97182931865.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/dodgeball_2004_parents_guide.pdfIn PDF document text
    • https://34ec465e-51aa-4dba-9a8c-c05fcfb5ae84.filesusr.com/ugd/df15ee_7d8f409c2d934c8fb9cb6d4e9db63519.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pukiza/25292062307.pdfIn PDF document text
    • http://vamavaremimot.atwebpages.com/assimilatory_and_dissimilatory_process.pdfIn PDF document text
    • http://pedamodaw.onlinewebshop.net/conversion_units_worksheet.pdfIn PDF document text
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_2f4c75649651482e8e0f988d881de5ee.pdf?index=trueIn PDF document text
    • https://8a89c5bc-485b-4808-980c-66c60e8d9908.filesusr.com/ugd/834936_09fa0b9c60fc49958e68cda4124c6a23.pdf?index=trueIn PDF document text
    • https://da89e6ec-52f9-4c28-8de8-447a2e923c0c.filesusr.com/ugd/5e5b2a_f70dcc9f9ae24ef1a7fac261c897bf42.pdf?index=trueIn PDF document text
    • http://mifofoxidil.onlinewebshop.net/bullneck_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/financial_reporting_manager_salary_ireland.pdfIn PDF document text
    • https://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_2793b3d5dfdb4c03818250bf8454ccf0.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
    • 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_off0000ecd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD9 5384 bytes
SHA-256: 0028d1475e388fad23ce6521041f387e5b5a0735ace614eaf0c271da8dc4e779
font_01_sfnt_off0000ff16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF16 12304 bytes
SHA-256: ee49af9dc83d6a9cf232ef829bfe260b9b527ec1416dc8b7a9970edfb72e09f9
font_02_sfnt_off00012972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12972 16192 bytes
SHA-256: ba11235328a63a6eb109888d204d781b1b3f2906d8089fca293427c861a3ca1b

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