Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f34f26bf3b06fe…

MALICIOUS

PDF

85.0 KB Created: 2021-03-25 08:52:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 263e61be8e4f53b55cedd63a1e943db5 SHA-1: 58c1381f3aba922826b1c2f5da599a478af8347a SHA-256: f6f34f26bf3b06fee7f901154cd4a084f2bb9bd3d6a775583dc0878f3ff95b35
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 0.9995

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://xajibur.ru/strik?utm_term=what+setting+should+i+set+my+scotts+spreader PDF link annotation
    • http://busowalukifejel.22web.org/65778771861.pdfIn PDF document text
    • http://mevakimuvu.mypressonline.com/cervelet_anatomie.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://03ca3561-abfe-48ca-9b59-b1b2b77f8126.filesusr.com/ugd/1af49e_bd6f6fb375dc42b4904c57340840ad35.pdf?index=trueIn PDF document text
    • http://wawikoduvebakap.onlinewebshop.net/acute_appendicitis_complications.pdfIn PDF document text
    • https://8319d365-0190-44ee-b2f3-e76f6fd230eb.filesusr.com/ugd/112488_08ed9ad175e0442893a1c6299e9fe5e9.pdf?index=trueIn PDF document text
    • http://veruzixiki.rf.gd/72229772471.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/redemption_manual_5.0_book_3.pdfIn PDF document text
    • http://totuxivez.onlinewebshop.net/anti_inflammatory_diet_pyramid.pdfIn PDF document text
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_3f2770daf803473a809393de32b1f9ee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/gino_rossi_shoes_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/sipoz.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/kaweriminobo.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/rule_1100_gph_automatic_bilge_pump_manual.pdfIn PDF document text
    • http://jovured.rf.gd/17404595402.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/zugotugom.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/safenet_hsm_administration_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/30475125665.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/wilirilamexav.pdfIn PDF document text
    • https://010f2e21-25ca-4560-806d-08cbbb7c7db1.filesusr.com/ugd/74a852_35f8a3af0d0942ada6c793471adcf31c.pdf?index=trueIn PDF document text
    • http://jilubumidevub.rf.gd/25965130396.pdfIn PDF document text
    • http://rovututuxopi.epizy.com/nature_images_hd_for_desktop_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/florida_vehicle_registration_information_lookup.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_off0000f3e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E9 5600 bytes
SHA-256: 681a5e38ed18716772cf7caad11ca9372540e9a4372d7e0ebda345da05a22127
font_01_sfnt_off000106de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DE 11836 bytes
SHA-256: 49b0e235d9cbcb308eaaab031c0aebf4a28c248a93444e73fe8e7a41f4308079
font_02_sfnt_off00012f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F44 16204 bytes
SHA-256: c14e12d429590e192ee4b80b38afd70826b3a12d5ad631bd6aa5d3f7e5173dba

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