Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2562323efbbb58d…

MALICIOUS

PDF

81.4 KB Created: 2021-09-16 20:25:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e34ff6af1cbce10f5ab0b321965c4754 SHA-1: ea88d0ca67039186aab5cdbad5aeeffbe7db2f93 SHA-256: e2562323efbbb58d2e64474e57fada21b7a3f76ac7b00f71d68a545485b9d6b5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by a ML classifier and ClamAV, detecting it as a phishing trojan. It contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS upload storage or disposable hosting, suggesting an attempt to obscure the final destination. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://sweet-sugar.de/images/uploadedimages/file/44167708802.pdf In PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139ee5bc0c37---36494741185.pdfIn PDF document text
    • http://prmakeup.com/Image/files/17097701471.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613685a835370---fegeromabad.pdfIn PDF document text
    • http://dansungsala.com/uploads/files/98775174926.pdfIn PDF document text
    • https://www.seblocation.com/ckfinder/userfiles/files/purexopekedozerigek.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/xepiz.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/8892e633facb802d9a6b4e1680d22c7e/88895415285.pdfIn PDF document text
    • http://janjoling.com/public/ckfinder/userfiles/files/nozurekukofibex.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/11040493106.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/jakufuta.pdfIn PDF document text
    • http://associazionemillesogni.it/userfiles/files/nedurixukabit.pdfIn PDF document text
    • https://www.khaosanpools.org/ckfinder/userfiles/files/52356766417.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/26971001560.pdfIn PDF document text
    • https://jmclimatizacionhvac.cl/images/subidas/file/fipirubibufadoxe.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/b842057bghv8322dufeflp1bpk/livapatoz.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///2035874771.pdfIn PDF document text
    • http://idcla.net/upload/files/xojolifevedelimoj.pdfIn PDF document text
    • https://tranhdaquyhn.com/uploads/news_file/kerowivufu.pdfIn PDF document text
    • https://samsungdvmklima.com/upload/ckfinder/files/55885403570.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136c84a1abc7---xemamitud.pdfIn PDF document text
    • http://quangcaosmsgiare.com/media/ftp/file/53388242146.pdfIn PDF document text
    • http://secretinvitation.net/images/files/mitenuwuwoliwol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=american+beach+house+full+movie+watch+onlinePDF 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_off0000d790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD790 18068 bytes
SHA-256: f46cdde3e92fa988dda2425ce2d09d6fb28d589aad26c5544bc38967c8aeeccc
font_01_sfnt_off0001063f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E56 10976 bytes
SHA-256: f9fc1c82b04919dd53e8ea9201ef65ed2f86a0b31cb86b6044143b2eefdb0691

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