Malicious PDF — malware analysis report

Static analysis result for SHA-256 aecdfe782a4e3b34…

MALICIOUS

PDF

71.5 KB Created: 2021-06-02 18:53:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0b7342a07803ca0bc4c885d4b521c8cd SHA-1: e57b1552ad58376e4c404bfd251e6ab6500488ce SHA-256: aecdfe782a4e3b34518984b7c2f4459b22859a4b8ddc992bbb55f914f6d1d715
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and heuristic detections indicating it is a phishing document. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure for a download, directing users to a suspicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crysiq.ru/pbw?utm_term=tekken+blood+vengeance+hd+download PDF link annotation
    • https://sumulepali.weebly.com/uploads/1/3/4/8/134882140/jubobuvukupaxatap.pdfIn PDF document text
    • https://gupoxebexu.weebly.com/uploads/1/3/4/3/134337811/4245405.pdfIn PDF document text
    • https://linowatudevenur.weebly.com/uploads/1/3/4/5/134599813/6879452.pdfIn PDF document text
    • https://wetebaxa.weebly.com/uploads/1/3/4/3/134343617/bejelupimur.pdfIn PDF document text
    • https://fitadidexedas.weebly.com/uploads/1/3/5/9/135977916/147985.pdfIn PDF document text
    • https://wuxipatinux.weebly.com/uploads/1/3/4/6/134662372/voxozasapoxone_gumenusegoxali_bekexelum.pdfIn PDF document text
    • https://roxadiruxezagu.weebly.com/uploads/1/3/7/5/137514248/pudikaxujulupo_pepev_muwitowabek_tinevogiketus.pdfIn PDF document text
    • https://wulidinuwiniz.weebly.com/uploads/1/3/5/3/135326152/pokejopuweg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kelivesas.pbworks.com/w/file/fetch/144455178/what_does_prednisone_cure.pdfIn PDF document text
    • http://vawijoj.pbworks.com/f/bilifavewaxarokuzunuvebe.pdfIn PDF document text
    • http://paderukut.pbworks.com/f/download_wwe_2k16_for_pc_highly_compressed_99mb.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/144418245/long_vowel_worksheets_for_first_grade.pdfIn PDF document text
    • http://kukepofarit.pbworks.com/w/file/fetch/144471405/9_snf_palme_kimya_soru_bankas_fen_lisesi.pdfIn PDF document text
    • http://jajafad.pbworks.com/w/file/fetch/144427800/xakazep.pdfIn PDF document text
    • http://ritijix.pbworks.com/f/72336297890.pdfIn PDF document text
    • http://jesababa.pbworks.com/w/file/fetch/144413847/what_is_the_difference_between_direct_and_indirect_object_pronouns_in_italian.pdfIn PDF document text
    • http://xojifot.pbworks.com/w/file/fetch/144426468/83050369001.pdfIn PDF document text
    • http://kapetipubi.pbworks.com/w/file/fetch/144426048/youtube_go_app_for_pc_free_download_new_version_windows__mac.pdfIn PDF document text
    • http://munonoraze.pbworks.com/w/file/fetch/144455487/how_do_i_reset_my_amazon_fire_stick.pdfIn PDF document text
    • http://funinupun.pbworks.com/w/file/fetch/144418392/xidunozitoxese.pdfIn PDF document text
    • http://poxanoralanu.pbworks.com/f/27460179464.pdfIn PDF document text
    • http://guronavageba.pbworks.com/w/file/fetch/144516120/how_do_i_download_payslip_in_hamraaz_app.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_off0000d8c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C7 5232 bytes
SHA-256: aaacd3fa4b0a6839dfddf3cbc11fd8dbf1472ca6b89034eacb5aabd85ae3f7e1
font_01_sfnt_off0000eaac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAC 10540 bytes
SHA-256: 8fc0c823d9da95f70df74097d9fe375e10465bdabc191ef07d6194398764c2ad

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