Malicious PDF — malware analysis report

Static analysis result for SHA-256 d18c132edd46f7c0…

MALICIOUS

PDF

88.6 KB Created: 2021-09-18 22:38:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5ee64bf8fc460196a7748ab66df3d59f SHA-1: 8d0e1725eb3d4b3e59de30f458d4fe78b5162673 SHA-256: d18c132edd46f7c00a0796c3b0696f6b5a4cff0af49779c319a56460085f4e5f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a phishing or spamming campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is designed to lure users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://cloverdiamond.com/file/82406120258.pdf In PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/nurafafoziwujikizibuvos.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/24229882487.pdfIn PDF document text
    • https://rugerwafers.com/demo/ruger/beta/userfiles/files/76378581765.pdfIn PDF document text
    • https://jotekonybakterium.hu/userfiles/files/34109554862.pdfIn PDF document text
    • http://shiokuda1.com/contents/files/88130709805.pdfIn PDF document text
    • http://sarigol.kr/userData/ebizro_board/file/61531882981.pdfIn PDF document text
    • http://remobudostol.pl/pliki/81137621837.pdfIn PDF document text
    • http://saipanbooking.com/FileData/ckfinder/files/20210908_9548613505B9DA81.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1613bbed2295ff---28876152870.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/c9f969b1702163e55d2f7a914a226167/48477965061.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614260e9cb697---22352287638.pdfIn PDF document text
    • https://4wheelchile.cl/admin/uploads/file/najap.pdfIn PDF document text
    • https://samsungklimalar.com/upload/ckfinder/files/29675257805.pdfIn PDF document text
    • http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/kafupaduzusinegugivoziw.pdfIn PDF document text
    • https://deepex.hu/hirek/files/40897676855.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/taxidowibonexopefudidenut.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/25357382001.pdfIn PDF document text
    • http://rajhansnursery.com/userfiles/file/tidatipu.pdfIn PDF document text
    • http://sydjpg.com/images/upload/file/20210905_105635_126.pdfIn PDF document text
    • http://frutapac.com/ckfinder/userfiles/files/56520135684.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/161336f1496778---31935664468.pdfIn PDF document text
    • http://worldnaturalfood.com/image/upload/File/zupobapipofixosudelo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=1+trillion+zeroPDF 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_off0000def1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF1 18140 bytes
SHA-256: 28fcd2b01372f333ebffb10a728f2c4620ab9501702b3bb55a4c60d451dd1c90
font_01_sfnt_off00010e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12669 17676 bytes
SHA-256: 7b23cc3cfb1d73626671ee52792d27beed232f89364c8ed754537fedaf7413ae

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