Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2d235c8eb4b432…

MALICIOUS

PDF

90.1 KB Created: 2021-07-14 05:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ebe9737e0bbb1192fbfa3ce48ad519bc SHA-1: dd0eaf4d87c8342eaa9a4e70348215b4bcaa0e3a SHA-256: 9a2d235c8eb4b432458799532a70fc79ad2d03848f77d63a407af3d2c4bac53d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to websites hosted on compromised WordPress installations, suggesting a link farm used to distribute malicious content or conduct phishing. The PDF structure and embedded URLs are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://medvor.ru/uplcv?utm_term=pan+national+definition PDF link annotation
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b57159927bc---pitibonireka.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d32c8a1ed---47005235577.pdfIn PDF document text
    • https://stdtekstil.com/upload/ckfinder/files/wajeziwizusa.pdfIn PDF document text
    • http://hud101.vn/webroot/img/posts/files/lamanagefijesij.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/dinoxuzazoxuwazex.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/wogivonikuz.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606fda2bb750c---vowesunutin.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984330b672a---18843337520.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/4p38hd63dt6kccfjfl5dfabkk6/rabikekafoxalowerozoxo.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec5a80eced---putobemifiz.pdfIn PDF document text
    • https://campermagazine.tv/public/file/34636669141.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a996dcf145e---fuxexumosafagob.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/vixadufilesexuvediwa.pdfIn PDF document text
    • http://hilltopperalumni.com/clients/9/93/936f23dc4abb03f6d4a1aae2c8a32781/File/lowokatigofu.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/zegowodakexik.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086b21455746---remorisi.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607424cacf6f2---sojebutizofulinukuli.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160819bdd263a7---23361176554.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f747ae2cb4---fataredorube.pdfIn PDF document text
    • http://www.waetsukai.jp/system/ckfinder/userfiles/files/34089868850.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/vobojuxewu.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/17cff9877706ec4555777300b53ddbdd/34062150185.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/bamojosirukinevezade.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/881d0d097dedd407da97ca7d2b69c98e/17636631506.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_off0000fcc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000114d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D8 10080 bytes
SHA-256: 755a1a653a3eed8511d5b22fe0e1e1bbfe9534cdf2a18b8b0a3a3ee8297d4966
font_02_sfnt_off00012b5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B5E 17864 bytes
SHA-256: 632aa7f09b90d08bd589f35ad23c2b4e3613d014304e3f339b5b33cc30d24128

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