Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2af4667f677094b…

MALICIOUS

PDF

76.1 KB Created: 2021-09-07 19:27:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4a713836fbbdfc0981141efa8ad35ece SHA-1: a549dff62d8e11091f3bae43c1966c3215736d0a SHA-256: c2af4667f677094bc63ecc554024c2f0c40dd49905687327d884f2ffb4258541
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous URLs pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://laborke.ru/uplcv?utm_term=acer+aspire+one+zg5+user+manual PDF link annotation
    • http://autoscuolavalerio.it/userfiles/files/tetumekinuwag.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/cae97f045d0555dd9bfd327b70c7870d/zivikitetowo.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160b828b3bd3f0---gunawojegoba.pdfIn PDF document text
    • http://xn--aknmedikal-yub.com/uploads/file/70223468367.pdfIn PDF document text
    • http://deshdunya.com/blogimage/file/boganukibiraxax.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/xufidotemebuluz.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/7f9b7e91fe631973fd84a1f5e5470c6e/19317799055.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/41536210118.pdfIn PDF document text
    • http://dongtienlamnghiep.com/upload/file/punumuguvolekogukuwagunol.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/e8af9719e29eae9ca85ddd0625fb4558/8592769786.pdfIn PDF document text
    • http://josephfellerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/51268333742.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/ecc023123389d6625e93a3a61f8d9b29/95808174418.pdfIn PDF document text
    • http://chothuexehochiminh.com/userfiles/file/33592116789.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c71069b550---jawaxupo.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160cdde066f4f4---wexaxibax.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bd160895688---jixofupebonegudizuz.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/ruwazokiwuwuxoba.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/99479034516.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/xaluvabonap.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c39bcad3f---gafinuvetonikakiboven.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/e5222a003055de6b27c3bd2f9004c23b/sumeguvaxelepe.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210429105547146.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c62d8b9f02---25300050780.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ccdb65ab83d---81887627167.pdfIn PDF document text
    • http://keemunblacktea.cn/uploads/file/271656392864.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC519 10896 bytes
SHA-256: f7aa0b57768c6be659ec690573eed0dc7ddc63cb608b36d839ca92948a1c5e2c
font_01_sfnt_off0000de58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE58 16548 bytes
SHA-256: 65b0a742a27cea063164ae13e9fbbfe9fd424a4472cd49cf5df6843a257d8619
font_02_sfnt_off000108f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.