Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d566f9dbf035306…

MALICIOUS

PDF

87.0 KB Created: 2021-03-07 08:47:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d6ccf415fab3f87d49c5db21a86e8604 SHA-1: 89672fb4a0d7ec0203b4fff084d32de040819af6 SHA-256: 5d566f9dbf0353061bcd91692283fbfb663d8f34721e7613927bea8c15ca8255
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, with one notable link to 'baarspo.ru', suggesting it is part of a link farm or phishing campaign. The presence of embedded URLs and the PDF structure itself point towards an attempt to redirect users to potentially harmful content.

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 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://baarspo.ru/wix?keyword=infantry+pulse+seal PDF link annotation
    • http://cancandance.org/vitamix_blender_amazon_prime51q3f.pdfIn PDF document text
    • http://sexesex.site/venmo_account_setup_for_business901oi.pdfIn PDF document text
    • http://arendagg.xyz/95198406910a3j37.pdfIn PDF document text
    • http://lagutobokoza.22web.org/duplicate_spreadsheet_with_google_script.pdfIn PDF document text
    • http://goldenframecollision.com/dibujos_de_caras_alegres_y_tristes_para_coloreargjv56.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a91873a8-1f5b-4151-915d-af39eb211f25.filesusr.com/ugd/3f80ec_fe0f1f765e874378a75b04cbb1091078.pdf?index=trueIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_f74efe6bb8ab4b27836474e9afdad957.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/meludav/adverb_worksheets_for_third_graders.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/48594422104.pdfIn PDF document text
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_1a35a251fe8f46e8989a0dec7947c3d4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sitok/manual_administrativo_del_area_de_ventas.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/elliptic_curve_diffie_hellman.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/vemidezura.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/71824844257.pdfIn PDF document text
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_33f41f2704774b36bd848dd3789e60ac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sazixipame/how_does_load_order_work_skyrim_ps4.pdfIn PDF document text
    • http://peserexoseje.epizy.com/58357663333.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/wakinevigep.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/gta_sa_lite_apptoko.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/1189566295.pdfIn PDF document text
    • https://71a5d838-4e22-4830-8da1-7955ec3365f5.filesusr.com/ugd/f2f43e_6c06ef8d1c964e61bdb0bd1504887691.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/petikamov/poster_design_photoshop_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/1920948710.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_off00010411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10411 4932 bytes
SHA-256: 2f51ddb6a4b8eaeafce120505de1cf1e2741278b75adb0b2edf6a95590f2ccf3
font_01_sfnt_off000114f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F5 10460 bytes
SHA-256: 06a569df3f05ed4defacf75606cd740f9e9eb834ab32d351ae93241221c41cce
font_02_sfnt_off0001390e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1390E 16232 bytes
SHA-256: 341d02cba186ba6772df23f817f2153b8217c0ea9578c6472ff2a4edc5bd94cb

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