Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4c276a668e36b82…

MALICIOUS

PDF

80.4 KB Created: 2021-03-18 00:59:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2549bfe74240459899d5606bc1485079 SHA-1: 37fb0bef68ee52c937bb5e1184fa62cddb5f1cf4 SHA-256: f4c276a668e36b8214294708a969f4c8f75fd16c0c4deca4e59321527a688d77
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 0.9993

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://fokemale.ru/wix?keyword=apple+airport+extreme+manual PDF link annotation
    • http://kiluzilaw.sportsontheweb.net/1317795077.pdfIn PDF document text
    • http://mizizufiku.mywebcommunity.org/48595868737.pdfIn PDF document text
    • http://canonsburglake.com/how_do_i_program_my_overhead_door_codedodger_remotepw7ab.pdfIn PDF document text
    • http://megivisu.22web.org/girunuxododisipujuzupuwig.pdfIn PDF document text
    • http://agreevudb.rest/22914448765qyrsc.pdfIn PDF document text
    • http://rolopigabetitu.scienceontheweb.net/14776569648.pdfIn PDF document text
    • http://trastenmyqort.online/33755136553nnu48.pdfIn PDF document text
    • http://wutopezogegusi.getenjoyment.net/free_catering_business_plan.pdfIn PDF document text
    • http://sodahq.pro/rakozugamometawubawoposewbxqi6.pdfIn PDF document text
    • http://my-favshope.online/taxodifofavuxugumifutejoh98.pdfIn PDF document text
    • http://sekasululaba.iblogger.org/senazovolevisivi.pdfIn PDF document text
    • http://jazeforip.22web.org/wananewajumas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_eab154292de7418690abd4711ffaf4bc.pdf?index=trueIn PDF document text
    • http://totajenu.epizy.com/adding_and_subtracting_polynomials_worksheets_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/13122185999.pdfIn PDF document text
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_ce2252972ee241d2b3afa828f1510114.pdf?index=trueIn PDF document text
    • http://wegugoleta.onlinewebshop.net/133695229.pdfIn PDF document text
    • http://nobajoxeruxepin.rf.gd/xaxatefizeseme.pdfIn PDF document text
    • https://c6506652-bf5e-4f52-be36-03dbfaede22c.filesusr.com/ugd/f74919_0566823a06934feb9192e215cbbe48c7.pdf?index=trueIn PDF document text
    • http://lunujebof.rf.gd/calculate_the_centroid_of_the_shaded_area_from_figure_1.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/wuwalavasifeg.pdfIn PDF document text
    • http://kabekexivebinef.epizy.com/blue_parrot_bird_picture.pdfIn PDF document text
    • https://4a39c6c9-989b-4d11-b2d8-cc0becc7f193.filesusr.com/ugd/ef0078_ce78684d5b694232aa0e65593c135d79.pdf?index=trueIn PDF document text
    • https://27f1a270-5048-4778-87f0-574dfe85248a.filesusr.com/ugd/b7306e_17c581c94d0e48bd8163b5b05b210b7a.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_off0000ffae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAE 4844 bytes
SHA-256: d2d7a2d04fe83dffc13da6dca43a2079e746bb8b711722a77868d0a9bcb0b0d3
font_01_sfnt_off00011017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11017 10584 bytes
SHA-256: ce0af46acd30fd1ad0b1490a1ecb757b1aa0752681049a349d13a56468b6cd56

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