Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee05d145f73d6776…

MALICIOUS

PDF

83.2 KB Created: 2021-09-01 04:15:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d23dc9ba41f518473bf4477eee594955 SHA-1: e69a9382e5f599afee6f6a1e532eb50426ec7361 SHA-256: ee05d145f73d67763d450dabb1b6a469575e7fdef40507017f987c0cf8cb88eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating it likely exploits vulnerabilities or serves as a phishing lure. The file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the detection as a 'Phishing.Trojan' strongly indicate an attempt to compromise users through deceptive redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://lightningriskassessment.com/ci/userfiles/files/67089572933.pdf In PDF document text
    • http://csc025.com/userfiles/file/20210808203644_orz1h5.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/dea5hsaa97o6tn9f22m14v3hi6/81763329428.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/171b89c63d640498040707436f3eac49/duvinamazaluginerivuxikun.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838c2067a63---mogesodenarobitejeboreda.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/0d844cf8437eed590ecf89ab6071683e/lemosaguxudemesaponanen.pdfIn PDF document text
    • https://jeevandeepspecialcare.com/ckeditor/ckfinder/userfiles/files/46452165158.pdfIn PDF document text
    • http://czerwoneiczarne.pl/files/file/dafefomowofadukebe.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/vevobokutedutuj.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/e10af5c889dc54767b91391660b2b072/16866698447.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/5587143989.pdfIn PDF document text
    • http://totoquynhhuong.com/upload/files/63323397007.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/290f06b3b72a9695eb9bc1e5132f9bf1/2379069423.pdfIn PDF document text
    • http://debeleven.net/UserFiles/File/55148891460.pdfIn PDF document text
    • http://ssatripoli.org/userfiles/file/51879872071.pdfIn PDF document text
    • https://www.domaine-vrignaud.com/ckfinder/userfiles/files/fazusikenakuxagepubu.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/64389917007.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/3ed3985a34672efd06da52ba68df25cb/kuxaxaruwatipu.pdfIn PDF document text
    • http://lsbwg.com/ckfinder/userfiles/files/20210812/0913199889.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2f1d0e0d9---tepotisarazubiz.pdfIn PDF document text
    • http://01host.ru/userfiles/files/22024697386.pdfIn PDF document text
    • http://ourhkg.com/UPFILE/userfiles/files/lijenogugusinuwuzemetul.pdfIn PDF document text
    • http://spl-designs.com/ckfinder/userfiles/files/28821354349.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/33323383198.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=difference+between+a+predicate+and+a+verbPDF 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_off0000e1d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D1 17080 bytes
SHA-256: 557c9f9e832768400ca7aa000c98906b7b816b2e5dc21c835cb957f698491737
font_01_sfnt_off00010d62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12579 10572 bytes
SHA-256: d642b79d5bddbf4ef9edf388b17fc9b42792f35cc62d32fe3afeb0fa52a71d25