Malicious PDF — malware analysis report

Static analysis result for SHA-256 16019be98bb40ec1…

MALICIOUS

PDF

74.6 KB Created: 2021-03-12 11:52:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: d05462689eebca405499b715e8976a9f SHA-1: 77d058d91670d68068f9e9be9ee146c4be69f3dc SHA-256: 16019be98bb40ec1d4a945822d634eac53f08c3b88d49559b979dd00e486d8b5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs pointing to disposable hosting, suggesting it functions as a link farm or redirector to malicious sites. The presence of embedded URLs and the overall structure strongly suggest it is used for phishing or to deliver further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://ponafet.ru/wix?keyword=universal+male+suffrage+amendment PDF link annotation
    • http://chistohome.moscow/seviveporuraja78x7w.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/bjdVgcp/2533329136.pdfIn PDF document text
    • https://cdn.sqhk.co/tilekixu/ggifjdK/tcc_pesquisa_bibliografica.pdfIn PDF document text
    • http://wopebexe.66ghz.com/24182394156.pdfIn PDF document text
    • http://loleveze.iblogger.org/contador_publico_concepto.pdfIn PDF document text
    • http://xugerovogubex.22web.org/how_long_does_a_bradley_smoker_bisquettes_last.pdfIn PDF document text
    • http://losmopaka.site/mimavapiwudebafawab8z8jd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371004/normal_5fee2f69c100d.pdfIn PDF document text
    • http://soldonlakewood.com/84351143277lv7oa.pdfIn PDF document text
    • http://xeeewq.xyz/boy_scout_book_202099pzz.pdfIn PDF document text
    • http://hrushch.space/gina_guidelines_asthma_action_planiw2wk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444647/normal_604a7561dfdbb.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/iEniEtX/miraculous_ladybug_running_game_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375522/normal_600ff0b7f0ec4.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/3cd02def-de50-4d99-81b5-a3f6cd68e61a/why_is_macbeth_a_popular_play.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8c72a5e-258f-44da-934b-477fa20227fd/how_many_quarts_of_oil_does_a_2012_toyota_highlander_take.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d5e683c-4783-4d4a-aa23-cfafe9cac029/burris_eliminator_set_up_programming.pdfIn PDF document text
    • http://kupikobu.epizy.com/rizimu.pdfIn PDF document text
    • http://delupujak.epizy.com/27918016757.pdfIn PDF document text
    • http://fanutebuxus.rf.gd/15020401572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22bd22a9-9703-49ab-b408-6c83f8a3e803/52562361723.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_off0000e8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FF 5276 bytes
SHA-256: a1a432069d56a740642a0e9e635b0aa40b7fe91975441ad4026a635bcf96a693
font_01_sfnt_off0000fae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE4 10028 bytes
SHA-256: e4b1591cc6c552d3d438a9fc38dfc69fe33df5ccea6983eed6056a1f918a4a48

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