Malicious PDF — malware analysis report

Static analysis result for SHA-256 67fc70e6baa27b29…

MALICIOUS

PDF

80.0 KB Created: 2021-05-24 00:43:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 51b41382352cdd4a16c05e6c85246132 SHA-1: 0529df127ed2dae92b787b09cae1a24fb09a4c74 SHA-256: 67fc70e6baa27b2919b7a9db1a8e202f84a4e75e641b85a50f7f8a8dc04afe49
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary link pointing to a suspicious domain ('mezovuduw.ru') that is likely used for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/strik?utm_term=cuanto+es+150+gramos+de+harina+todo+uso+en+tazas PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455374/normal_600da2e26528e.pdfIn PDF document text
    • https://tadiselugel.weebly.com/uploads/1/3/4/5/134589133/larotepolibidis_xodadenegira.pdfIn PDF document text
    • https://salobejutar.weebly.com/uploads/1/3/4/5/134589592/zedazidepakukuwagu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375355/normal_605584a30587c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c45720b2-919f-4124-be1a-45a917f2cb84/transferencia_de_materia_y_energia_en_los_ecosistemas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5a37954-855c-428a-b7af-aee41b1ebbde/cassius_julius_caesar_character_traits.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/ser_conjugation_formal_command.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/english_to_spanish_common_words.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/28776125159.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/38670191613.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3591ba3-6271-4526-a5e4-201851f2e378/what_is_the_x-component_of_a.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/larabilefenodiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f531d91-6808-45ff-a38b-4a7040976309/what_oil_does_a_john_deere_d140_take.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/geometry_corresponding_angles_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43171b28-0863-4141-9cfa-0238e7026434/how_to_use_a_4_step_buttonhole_foot.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/black_chunky_block_platform_heels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/303291dc-9615-4c2c-8cea-ec2457e95b20/is_donkey_kong_64_coming_to_switch.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_off0000dfad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAD 5480 bytes
SHA-256: 1a9e0e493be894e7ba9fa9beea97845bc01c28f7c1eae0c29023ebe8d8fad87c
font_01_sfnt_off0000f22a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22A 13144 bytes
SHA-256: 4a4250cc7f13fb0d3148854f3514c796667513e32484ce13259084b30f222c68
font_02_sfnt_off00011bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBE 16076 bytes
SHA-256: 38fb95279055b2b92fd625b72a29e6904e371575b2130ed7894d4e2584a52df3

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