Malicious PDF — malware analysis report

Static analysis result for SHA-256 05023791dc5ae857…

MALICIOUS

PDF

81.1 KB Created: 2021-04-01 14:24:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: dfabd83f191bd927becb3d975f6b452d SHA-1: b5f4b5d893ead66bf314391daa2e5f6e5b6c16b0 SHA-256: 05023791dc5ae8574b076d66a4575c14ef406eb4c0d9c84b119c1adc92ce9b76
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. The primary URL, 'https://seumenha.ru/wix?keyword=subaru+stickers+canada', and another linked URL, 'http://refofigeto.epizy.com/pdf_annotate_apple.pdf', are indicative of a malicious intent to redirect users to potentially harmful content. The ML classifier and ClamAV detection further support its malicious nature, classifying it as a phishing or trojan variant.

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://seumenha.ru/wix?keyword=subaru+stickers+canada PDF link annotation
    • http://bezoxafeme.iblogger.org/34895579840.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://refofigeto.epizy.com/pdf_annotate_apple.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/baumer_pressure_transmitter_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4e943a3-198d-43f4-94e5-9d66a51b8899/mechanical_engineering_internships_colorado_springs.pdfIn PDF document text
    • http://totegipokazize.epizy.com/95546836261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8daa2b4b-38b1-4806-a4fa-36df22abb108/essential_physics_textbook_answer_key_chapter_6.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/platform_movie_song_tha_tha_tha.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/enterprise_architecture_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/tabela_de_preos_de_carros_novos_portugal.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/precalculus_with_limits_a_graphing_approach_7th_edition_teachers_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2035b18-7e0b-415a-905a-0b79c9feb0e3/47330094392.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/new_bhojpuri_video_hd_dj.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/numoj.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/87387116269.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/reinforced_concrete_design_to_eurocode_2_mosley.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/five_dysfunctions_of_a_team_character_analysis.pdfIn PDF document text
    • https://74fc1a11-d445-4ffb-bc6b-7a79e5a65a18.filesusr.com/ugd/097bd5_c93858c4f68b4cb9a059715d34d4584c.pdf?index=trueIn PDF document text
    • https://5e54d98c-4257-4cc7-9010-48f3df296eb2.filesusr.com/ugd/05240c_11a5b9a296704566bbcd2a8be7ecce35.pdf?index=trueIn PDF document text
    • http://naxosavor.rf.gd/velukadexolopeloralutow.pdfIn PDF document text
    • http://tisudaxutuz.epizy.com/baron_geddon_guide_wow.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001004d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004D 5208 bytes
SHA-256: ba09847bce636da2e73c0e03f2f08dad8c5403ae2a702712010d06afc6b7c712
font_01_sfnt_off00011210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11210 11012 bytes
SHA-256: 5f16b954a51a980d374a7311c54cbbba10f40aa58e525944ff49c7057c589e55

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