Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2872db32035b36b…

MALICIOUS

PDF

70.8 KB Created: 2021-03-28 18:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5ebae310aef5fe55f11add3c6f42a2a0 SHA-1: 06620ae43e55f5bff855d3d665a17702f1a9ee74 SHA-256: c2872db32035b36b003e24b19a288195d3d94719e5181f40292586425038a25c
126 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, specifically identified as a phishing-related trojan. It contains numerous external links, with one prominent URL pointing to 'seumenha.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, indicates it's presented as a worksheet, a common lure for malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://seumenha.ru/award?keyword=animal+tissue+worksheet+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384647/normal_6017c267c3d0e.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/90361197504.pdfIn PDF document text
    • http://jonipifenukiz.mygamesonline.org/66692994829.pdfIn PDF document text
    • http://legko.travel/gipumulajotafewijanw7svd.pdfIn PDF document text
    • http://repair-kompov.ru/911240117330o6iv.pdfIn PDF document text
    • http://remoliwagofaju.mywebcommunity.org/payg_payment_summary_annual_report.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415326/normal_6029b146ab286.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/dark_souls_2_design_works_review.pdfIn PDF document text
    • http://nikaold.site/electricity_and_magnetism_relationgjdsv.pdfIn PDF document text
    • http://lojasamericanasbr.com/56960314257rueg7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421217/normal_602a428a20812.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374368/normal_6027907b69691.pdfIn PDF document text
    • http://zetumitufam.mywebcommunity.org/baudelaire_paris_spleen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/xenuluso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/930299e1-b3b1-4102-bba6-5487fa0e02c6/59277609406.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/ba_3rd_year_date_sheet_2019_sol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac859481-6047-4021-b0a3-855705b84700/saxojetasudorirazatonu.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/how_much_does_an_ekg_tech_make.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72b4ce4a-167d-446c-a25f-5ff4d7bb86fa/39920585845.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20c21ffa-1dab-4908-8cc8-dde5be49eb29/which_oil_filled_heater_is_best_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/crispr_cas9_guide_rna_length.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5d11030-9622-4e38-a047-0d2073eb7486/gatafafu.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/61006838418.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/divasakaxagivirokerubuvo.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_off0000d8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A3 5424 bytes
SHA-256: d5181e6d06244bfe73aff94b2e3ae21f6d3e04f23b79185978cb7fb11080562b
font_01_sfnt_off0000eaf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF8 10220 bytes
SHA-256: 23ca8f83016c3d685bbac2c796926e180d136eb7f58991dbc5d02182a300eeef

Open this report in the interactive analyzer, or submit your own file for analysis.