Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b0e726d28bbe984…

MALICIOUS

PDF

78.2 KB Created: 2021-05-06 03:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: afd1f20e79547daddaf47b3a2bbf2b1c SHA-1: df58708eeb84da7c39d634b8aae3fd2585521a57 SHA-256: 4b0e726d28bbe984d992ff4d01feb610625c9fee20545235f708852461296015
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://gimoguvi.ru/strik?utm_term=my+bluetooth+speaker+is+not+showing+in+playback+devices PDF link annotation
    • https://cdn.sqhk.co/disumuneriva/oehbxjb/bubble_shooter_tm_game_download.pdfIn PDF document text
    • http://bcpzonasegura10beta-viabcp.com/purakaguzosupozavusus2wpm.pdfIn PDF document text
    • http://martans.space/22275310832ba4sl.pdfIn PDF document text
    • https://cdn.sqhk.co/pemenixa/i33Kgap/98621219743.pdfIn PDF document text
    • http://esclick.pro/digital_design_morris_mano_5th_edition_solutions_free_downloadmm6lg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_d0351cc99d56478e869d904178a3f4cb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/73_guideboard_rd_waterford_ny.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/31558699315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51742f3c-4242-4b2e-815c-02f88df77bda/what_is_paint_in_computer_for_class_2.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/what_makes_up_an_ecosystem_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adff77c7-376a-4552-b872-d8b801fee20a/what_is_a_marketing_manager_salary.pdfIn PDF document text
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_15ce6792e5fe4e2782afe161d416e442.pdf?index=trueIn PDF document text
    • https://5c126656-fc4f-473b-8c99-11744d2e1b96.filesusr.com/ugd/abd8ec_f51b7bc950ec4e88920fd8dc3af35470.pdf?index=trueIn PDF document text
    • https://f8b2de7a-6012-4721-b8f1-df5267d6bb95.filesusr.com/ugd/8ebb60_a2b4f0a7982b409596bbdfa1ecc6cf31.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/66f70978-04f1-4807-a7f0-021036496ccf/21135586070.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/bloodsport_van_damme_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/gojesanakoradulevon.pdfIn PDF document text
    • https://b81f28a7-a6cc-4df9-aebb-a76b708ee4b5.filesusr.com/ugd/df05b2_aacfe8c7a6ae47d1964fd76c25c0bf1d.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11D 5800 bytes
SHA-256: 281cad75537a4f5f6134fc56110cb509e41ead744352a1cfbdc173fc899a048f
font_01_sfnt_off000104f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F4 11128 bytes
SHA-256: fdc391f4ce07e9ec66b81296150a668959083a0a6151f8b4060caf59e43486c7

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