Malicious PDF — malware analysis report

Static analysis result for SHA-256 f457c7fa3eacaee1…

MALICIOUS

PDF

85.2 KB Created: 2021-06-25 18:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 5fa2a8ce386a38f35b83ff9af100a52b SHA-1: bcecc095c09786e242f9462cad855292e9b923ba SHA-256: f457c7fa3eacaee1a926039a58a54273b3a9633f7f7e10258f841f1f73177291
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and link farms points towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/20cc74f56050de0ddd358d3bb184ecbc/27112747351.pdf In PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/vowawefofukugararo.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/c8e7e9bb6f1f9539a39f176193b20188/wekijuzojofovasefupis.pdfIn PDF document text
    • http://austintownfitch1980.com/clients/879833/File/puxijigarekevevekowu.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/xowanonerefawivenunulasup.pdfIn PDF document text
    • https://drrajanmahtani.com/userfiles/files/49084749268.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/38255511576.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/xagorupezonurozuwifo.pdfIn PDF document text
    • http://superpart.com/files/rifatamop.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///35670405469.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210529020020.pdfIn PDF document text
    • http://jhferry.com/data/fckeditor/file///99249992304.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/5h5574a9vcrpnt8ru97fflppsp/zawaxev.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16091676adb19e---xobone.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea131a310d---rotaduje.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b13bc86d2e---vopapibiluve.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/girif.pdfIn PDF document text
    • https://xn--fct8ml6mwue.tw/uploads/files/likim.pdfIn PDF document text
    • http://shreyaghoshal.com/konadnew/userfiles/file/wejoxojewopajediwinaxile.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/6efa4922309ba56ab51d81c9b0770e24/36519572196.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/1f60ba113a14cbed11c4c26e525bffb8/disabizopovemuvajixa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=my+house+is+under+renovationPDF 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_off0000eb1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10330 17028 bytes
SHA-256: e3c977299e320847e72bc1a2c1df6df061d56fae0a6566df52c8b8f76a0ae678
font_02_sfnt_off00012fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FBE 10572 bytes
SHA-256: c5ccde4250dbc95b8aae672d2d54ff1425dbe946b7beec01f956c2a4021e3092

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