Malicious PDF — malware analysis report

Static analysis result for SHA-256 58ed4376a304808a…

MALICIOUS

PDF

85.9 KB Created: 2021-07-19 12:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 6804db9c88cf6d5910bdc9fcb0910b4e SHA-1: bd3e88a4c3b1cb16ed496e109da2c1891c916ea7 SHA-256: 58ed4376a304808a3c1d9550b8dec4902080f0663ce8ed682d48744d605209d7
216 Risk Score

Malware Insights

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

The sample is a PDF document that exhibits characteristics of a phishing lure, specifically requesting recovery secrets or private keys. The document contains numerous links to external sites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting an attempt to distribute malicious content or redirect users to phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of PDF vulnerabilities to execute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e9fa2653d---69213153549.pdf In PDF document text
    • https://angkalaris.com/contents//files/48821187071.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/36046834538.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609327995590f---61386214783.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b97a4533c10---91584317132.pdfIn PDF document text
    • https://wisserarm.nl/app/webroot/files/userfiles/files/pozonabigejefode.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/7fa56bf996bd37ee83ce777dc7c1f95a/divememanabisu.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/mmko52l2klg21j6go71gb9h7vq/kejixividejor.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/879d45f59c22a4dbbd065d0067bec0e1/45446398137.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f5e1aa831---jurakitimaxodalur.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b68e92a49---lixukawekesugipatu.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/defomipumepuledize.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/renukizux.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/94859493065.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711fb7b5676---58376482457.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/sonowaketobemijevowumunik.pdfIn PDF document text
    • http://falerisztika.hu/tmp/firixotiwi.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/l8ntfc7oj1qmfu0pqq1u35a1qj/sovudefiwibute.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/17741453655.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210523191617947.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/3aece48a619bb0d453641bd5df77c2dc/xiresog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+add+digital+signature+in+pdf+onlinePDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC54 17188 bytes
SHA-256: 2408278142fffd34712b0502bdc2715ad3db22635073214100cc1c655bb867ee
font_01_sfnt_off0001190e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190E 10852 bytes
SHA-256: b6288b911f2b987519409cdaaba83a25ab450bad64b7251a5fdec0896878c0ed
font_02_sfnt_off0001320b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1320B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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