Malicious PDF — malware analysis report

Static analysis result for SHA-256 e40fc7a96e2a523c…

MALICIOUS

PDF

73.8 KB Created: 2021-09-03 05:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 00a7c6b328361a62d49a8322a745197b SHA-1: 66e929cc6bc7d1f3b664a4a70da2bd79a997accd SHA-256: e40fc7a96e2a523cf2c73405f14fad2584b9e27226f00f0ee0d84dbd7ec5574b
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of a 'financial institutions pdf' UTM term in one URL further supports a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd243d7cdf---13868995266.pdf In PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ecd2dc174---7983247034.pdfIn PDF document text
    • https://mogilew.ru/userfiles/file/96398197795.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/62972553825.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c6bbe9d9b---tipafiwokut.pdfIn PDF document text
    • https://vinadesigndanang.vn/uploads/image/files/visuzugomu.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/57040251292.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/gidazelafapoletoguxobuxa.pdfIn PDF document text
    • http://maiodi.com/userfiles/files/givavomajuvofodotodo.pdfIn PDF document text
    • http://mn-print.ru/ckfinder/userfiles/files/75152308800.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/siganukivorakonavetir.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/122ff96af0f1fc9bc12cc79611f0a659/146622508.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/c1e72aef94741ceda3af04d2966323aa/taroka.pdfIn PDF document text
    • https://doublehair.center/upload/ckfinder/files/7066695472.pdfIn PDF document text
    • http://sushiosushi.com/uploads/files/53484276172.pdfIn PDF document text
    • https://mgc.to/sites//web/upload/files/36192774436.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070791a8892e---57899127515.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/sapopajodas.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac53978410d---59917225412.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/lokaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=financial+institutions+pdfPDF 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_off0000bfa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA4 16776 bytes
SHA-256: 5240608ab151a4b75eca19faabefa12258cb8f1ec71c92801fe2c0c109c24aca
font_01_sfnt_off0000ea75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001028c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028C 10456 bytes
SHA-256: 1ff727f8c44a249f24f08cc27a00f5bb4e402984667b4ffa6229b92156925f6c