Malicious PDF — malware analysis report

Static analysis result for SHA-256 411093619463ddf9…

MALICIOUS

PDF

81.9 KB Created: 2021-06-19 18:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 564fb66848e8bb9cd58ea3838e53b53b SHA-1: dcfe2f45f1a71ce4d6ff78bc02c22abe1e43b980 SHA-256: 411093619463ddf98a5fd1981ed95282bb3e1fbcd797e54e9613d8187a97e668
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to numerous disposable domains and compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The document body appears to be malformed or obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8149

Heuristics 5

  • 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
  • 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://catamma.ru/uplcv?utm_term=onbathu+kolum+ondrai+kana+mp3+song+starmusiq PDF link annotation
    • http://momsystem.ru/public/file/71103463194.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile/%5C/zemofirovigipelemi.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ec1e42679---96986755164.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/lilosiridufej.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608b34b415d8d---84421872048.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/82783850510.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b543e8c8f---55230678849.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091c84fb9cee---tibovefalatakibubu.pdfIn PDF document text
    • https://maxflowfans.com/userfiles/file/fexeliwaxidag.pdfIn PDF document text
    • https://marblobathware.com/app/webroot/img/files/3434141031.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/f06fcc14d2eb561b3447972ab1183366/47155975460.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16078337d995d9---82304783018.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/a8ig6jhkgu66sqcjq7d6dn0s35/43628882711.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3e83593fe---puwupexam.pdfIn PDF document text
    • http://jfhconsultancy.nl/userfiles/files/15995376780.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/348ae1ed176f984e33f50bcee731a62f/kumezuporogaxowojale.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/16846806411.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0f24af54f---59111866050.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160bce2dc350ec---tedupikamas.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160944bd492c49---23404872349.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000f5ee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF5EE 13756 bytes
SHA-256: ecdc626696c97e4e140c4e7af099849f498d8f2fb42cc17f0fd53d24bed37204
font_00_sfnt_off0000e229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE229 5892 bytes
SHA-256: 1d47910f4a3a911c2fe83f9f8ee74fbfec005f23df560b009112993ad65dafbf
font_02_sfnt_off0001174f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174F 11840 bytes
SHA-256: 876f308592a71d4589cdd50c37aaca4bab119da7cf7599905800cb614e2252f1

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