Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4636cea423409c8…

MALICIOUS

PDF

71.5 KB Created: 2021-04-02 15:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dd9727b41c12c4541cf690fcf199487f SHA-1: 297b7cfc07e9af137aa9b15266d0064e449d5406 SHA-256: e4636cea423409c8ea241565babd9ce2fde48ea8c418dac747809be9f3df1914
256 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF is identified as malicious by ML classifiers and ClamAV, and it contains numerous external links, many of which are SEO-optimized to appear as legitimate downloads. The 'SE_BRAND_CREDENTIAL_PHISH' heuristic indicates a lure impersonating Netflix, directing users to a malicious PDF via an abused redirector. The embedded URLs and the PDF's structure suggest it's part of a phishing campaign or a downloader for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://gonasegan.weebly.com/uploads/1/3/4/6/134640129/3368934.pdf.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://pelibifir.ru/wix?keyword=slope+and+similar+triangles+worksheet+pdf PDF link annotation
    • https://s3.amazonaws.com/rikolesafuwofar/alveolus_adjective_form.pdfIn PDF document text
    • http://pezozolagipiv.22web.org/32124930950.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/carboline_carbozinc_859_data_sheet.pdfIn PDF document text
    • https://gonasegan.weebly.com/uploads/1/3/4/6/134640129/3368934.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/angular_formarray_within_formgroup.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/19028310789.pdfIn PDF document text
    • https://juwufugoxeza.weebly.com/uploads/1/3/4/5/134528381/fakamajosiwejev.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/hisense_70-pint_2-speed_dehumidifier_with_built-in_pump_manual.pdfIn PDF document text
    • http://sesotilenavufe.iblogger.org/wukuxabemumu.pdfIn PDF document text
    • https://pupazugosabi.weebly.com/uploads/1/3/4/8/134868946/6996782.pdfIn PDF document text
    • http://pufivuziviv.mypressonline.com/applied_science_diploma_question_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/best_browser_for_android_2._2._1.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/24370167033.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zagebixomibolo.rf.gd/wopezigudojesatazu.pdfIn PDF document text
    • http://fipiwafupogo.epizy.com/fomukoronuxamano.pdfIn PDF document text
    • http://xiwexuxe.atwebpages.com/fasanikujaburakadivafofob.pdfIn PDF document text
    • http://rukaxeretipaj.epizy.com/how_to_clean_the_filter_on_a_dyson_big_ball_animal.pdfIn PDF document text
    • http://zejajedep.rf.gd/tejeduboxafufikaxuve.pdfIn PDF document text
    • http://sadakukozami.rf.gd/how_to_reset_kenmore_gas_stove.pdfIn PDF document text
    • http://durunorutap.epizy.com/92983843878.pdfIn PDF document text
    • http://kodosalepixalan.epizy.com/61870075810.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_off0000d9c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C1 5716 bytes
SHA-256: 68a2eb46c62d757d7976d0b353e73c0cfed479fc3a4845bf476b26565c4859bd
font_01_sfnt_off0000ed1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1E 10396 bytes
SHA-256: 25bf41dfd6687ec6ab9bb45400e09777eb98aa4a3d4d0cd090e31bdae32f0158