Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcac97762590bea5…

MALICIOUS

PDF

95.3 KB Created: 2021-07-05 15:42:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7cce8404c41f3937f98ba4f1b4ecdde9 SHA-1: 5885919f24b24c8d0a6e05eb0cae1ae6bfb2d7d4 SHA-256: bcac97762590bea56250d26a6e5b373902fe9d84f877936efe671260f124fcc5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites, including WordPress upload storage, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics point towards the file acting as a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/uplcv?utm_term=using+integration+find+the+area+of+the+region+enclosed+between+the+circles PDF link annotation
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/0bc1719c42f44e92ba97417e87f123cd/jijipokofinopinuno.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160885dc880ed5---3821297487.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160725ba65b9c2---pokivosafuforovitog.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/920105b72b420aee0ff51fdead2b0999/34522611716.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/6ea50134654253fcca9176c4a5e9c2e7/wokexezadeb.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/392bad1cceb34c5cb0d419d62110eb64/24999662773.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/776f3a999543598776696039d168652f/66913484181.pdfIn PDF document text
    • https://porterbrothersltd.com/app/webroot/uploads/fibojoborud.pdfIn PDF document text
    • http://richiefamilyreunion.com/clients/7/7d/7d03816b951c94fc7c065ced7c7ccdcd/File/85951589708.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/rofudesonefimetesozi.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/9dd26de86248058e1c18319527287b23/garir.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/vpeirafm6ieeh44fqqki9l33he/paromuboninaberuzisevobo.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0e6be7525---xaxogu.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/xeruburegi.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070db1d027d7---13458568980.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e331b5c6c2---2520128882.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ca30453056d---mugikunetaxanedin.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/wolokupajifu.pdfIn PDF document text
    • http://scheiden-maassluis.nl/uploads//file/33659557543.pdfIn PDF document text
    • https://medosojewellery.com/userfiles/files/forabigokoxegavupa.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606eae327d18b---tijuderoja.pdfIn PDF document text
    • https://nakipoglugroup.com/upload/ckfinder/files/zigiwedenesinamidaj.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/90397734664.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11125 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12937 17084 bytes
SHA-256: 43c285b5dd3fdd166a73f18fa3ac7d9dbc0d7f6d54687fa330fdaa715c68f09d
font_02_sfnt_off00015606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15606 10988 bytes
SHA-256: 16450c79c2d31d6b4ca3eaa98d05f731ab15a0c44d39a4241a87cceb488baeee

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