Malicious PDF — malware analysis report

Static analysis result for SHA-256 a602d13544731406…

MALICIOUS

PDF

76.5 KB Created: 2021-03-14 05:36:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7be0cc1c2f9b4b1fd9c44bb5a82dfc67 SHA-1: 299b9552a9482ed8b8934eb283a42a423e94574a SHA-256: a602d1354473140671043c1e84bb39a107eea665d897f2a2eb93553d22b53528
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'vilenefex.ru', which is likely used for phishing or to serve a malicious payload. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically to appear as a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/wix?keyword=willow+springs+kennel+pa
    • https://cdn.sqhk.co/fukonovum/e047gfd/silver_dollar_city_discount_tickets_aaa.pdf
    • https://cdn-cms.f-static.net/uploads/4489713/normal_5fd93ba847f82.pdf
    • http://nopubejojawe.22web.org/gafenaxokituvisewuxulaxis.pdf
    • https://static.s123-cdn-static.com/uploads/4417129/normal_6002c714ba3f6.pdf
    • https://cdn-cms.f-static.net/uploads/4420764/normal_5fe8c89f55b19.pdf
    • https://static.s123-cdn-static.com/uploads/4373757/normal_5fccd8ef4f4e5.pdf
    • https://cdn.sqhk.co/sanojuxako/hgDgijg/iot_farming_malaysia.pdf
    • https://cdn.sqhk.co/fononedegot/mYQCuXu/mufokikavedu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tikofaketonub/may_catalogue_oriflame_2019.pdf
    • https://uploads.strikinglycdn.com/files/ca52f831-f445-41de-a886-353b0e1e31d6/xenogevugavaxo.pdf
    • https://s3.amazonaws.com/wifukedot/reloj_citizen_eco-drive_skyhawk_blue_angels_titanium.pdf
    • https://s3.amazonaws.com/libosokune/oncotype_dx_report.pdf
    • https://uploads.strikinglycdn.com/files/4224db83-de92-45a2-a818-3d93b14c1410/after_we_fell_cast_trevor.pdf
    • https://uploads.strikinglycdn.com/files/6cbe04bd-bfbc-42c8-ac7a-08174dfae4a9/makorurusojusunitud.pdf
    • https://uploads.strikinglycdn.com/files/a3d89f21-b9cb-4520-9835-8c7858904235/hp_officejet_pro_l7590_price.pdf
    • http://goviragukipi.epizy.com/jazixonivofemaseligov.pdf
    • https://s3.amazonaws.com/zopenave/11862425247.pdf
    • https://s3.amazonaws.com/sikuva/after_effects_news_template_tutorial.pdf
    • https://s3.amazonaws.com/tiluwisulepam/mini_kaizen_event_template.pdf
    • http://kegipufi.rf.gd/human_body_sketch_book.pdf
    • https://s3.amazonaws.com/vunizi/lazarillo_de_tormes_adaptado.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed2b.bin
63c5d3a0b9b2292b8e578445aba462f2b84988fa11f6484bca4be704869368bc
pdf-font-stream PDF embedded font (sfnt) at offset 0xED2B 5156 bytes
font_01_sfnt_off0000fedf.bin
a8276e8bc1d51e660c3816296f132c144b7687b7d0e420caa30e1be71ef9d11f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDF 11520 bytes