Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e70100880a0956c…

MALICIOUS

PDF

73.1 KB Created: 2021-03-04 06:30:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 1147ad787f2ef7d18d61ed10585e2121 SHA-1: d7b01c9ba798b88e045b03cca052c1640f21cc2f SHA-256: 3e70100880a0956c75514723bf74a5866998ceac89318ae3d8622f082252ffbe
96 Risk Score

Malware Insights

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

The file is a PDF with a high ML classification and ClamAV detection, indicating malicious intent. It contains an embedded URI pointing to a suspicious domain, likely used to host a phishing page or a second-stage payload. The document body is heavily obfuscated, but the presence of the external URI suggests a social engineering lure.

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://seumenha.ru/123?utm_term=is+the+word+class+president+capitalized PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481828/normal_5fdf5732efdbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410674/normal_5fe7950294281.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389104/normal_602c77e759d4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472775/normal_6018338cbd36e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469641/normal_600fbb6c2c9c0.pdfIn PDF document text
    • http://vebenuzan.22web.org/lodapimeruwiwijo.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/sefukirexuwekij/92635714002.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/cooler_master_storm_stryker_atx_full_tower_case.pdfIn PDF document text
    • http://buxozininexe.epizy.com/new_bollywood_movies_2019_1080p.pdfIn PDF document text
    • http://ferenekukosazu.epizy.com/kuvagotukixenilezezalitag.pdfIn PDF document text
    • http://katetagozu.epizy.com/nikekof.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/editing_scanned_documents_free.pdfIn PDF document text
    • http://lanikudawojag.rf.gd/wd_my_cloud_dashboard_login_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/jizuretepakevonun.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/text_font_bold_in_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/63903926313.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/andromeda_aosp_apk_free.pdfIn PDF document text
    • http://faninidup.epizy.com/movies_counter_sultan_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/allshare_play_pc_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/samsung_c460_printer_user_manual.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_off0000de73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE73 5240 bytes
SHA-256: afb53ecc5c610c4022875d90e3a8a84efafe232a2c311f481dc8d366e0a2432a
font_01_sfnt_off0000f05c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05C 11484 bytes
SHA-256: 1842f4bb0fa181fcd29bf66f9076068ed9bab4241d5d457a13598ff7d77371b7

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