Malicious PDF — malware analysis report

Static analysis result for SHA-256 985c4a77fe2f2c7a…

MALICIOUS

PDF

92.3 KB Created: 2021-06-27 01:59:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: e13b8851d7f20e47d3c34d8d6d90d1f1 SHA-1: 7542ef7ec49f8a1b41813769aa75261e86311cad SHA-256: 985c4a77fe2f2c7ad791d5d9dd17ce4cd3d77eef6d8abe24bcc5af4adca95e8f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The file was identified as malicious by ML classifiers and ClamAV, and heuristics indicate it is a link farm document designed for advance-fee scams. The document contains numerous URLs pointing to potentially compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the overall structure and heuristic firings strongly indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/2795be1bcd45bac0b1e1ee8eca42f355/27046481544.pdf In PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/79inegm1ol32mdvv4n9o2dpe5h/guzajobinaxalixuxovamo.pdfIn PDF document text
    • https://rivnerun.club/images/files/beditumituposabozesajofej.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/12172732497.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073df2bcb249---80124749694.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e32283f36---soforumivuli.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16078aedd22c31---78966460738.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160867f9aeed7e---vakomexitamoduwoso.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/8e81def6c86b22a82fa61b79db0a3d85/tigojanamok.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c73d202a670---woruwafuwikigobupiki.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/dlm8aqki6uk44rt75bdn9r64ob/fugura.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/wogomez.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/ecc17d4f6bfcad2dfa900a032c5ce38c/32565120966.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/7a38d1a59b2522be4f5921455ed32a67/84630753642.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/df0d158ca6f60f777e6f586ad64d7fd6/xuwejubep.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0dddf32d6---8258343280.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160762ee3b5813---2063738370.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/5f21c7da07e9946178eb978d90b99db8/35357551316.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2c78aa7ff---68039900461.pdfIn PDF document text
    • https://maplesservice.com/wp-content/plugins/super-forms/uploads/php/files/311135db9c3656561524596a9e2306d3/57263440315.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/a24794e263d01f90b2b2f07f7795cef5/15237716820.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/7cab830dcb6b1a67c375166a73af50d0/rusikeletibogogeb.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b673e98c305---bimajititolitigaviteli.pdfIn PDF document text
    • http://alexandercdg.com/clients/36029/File/futofumaxoposonitenepuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=sterling+holloway+cheshire+catPDF 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_off000105a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A1 17396 bytes
SHA-256: 39f0e5e7ba5eb9ac1ee4ce24cdc627cc9513a666643133ac0b7b02db2028d71f
font_01_sfnt_off00013312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13312 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B29 10784 bytes
SHA-256: c36b84cdda38c0b6e0b0a76023a00acb4324cc93aed55a4b0222ef2ab462e010

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