Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee868e3c8f0b1f4…

MALICIOUS

PDF

79.8 KB Created: 2021-09-07 01:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5909450f64d1c902aec3495da38707a0 SHA-1: fdfa490e95e22c1f0bb1af9b5384b2f1cf6a91a4 SHA-256: 1ee868e3c8f0b1f4f1a863c603959283c003438464ad8fcb3369cea5379e8e70
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to phishing or malicious content. The presence of embedded URLs and the overall structure point towards a phishing lure, likely attempting to trick users into downloading further malware or submitting credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://crysiq.ru/uplcv?utm_term=abnormal+psychology+lecture+notes+pdf PDF link annotation
    • https://geneolock.com/locktactyuma/userfiles/file/39087764841.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/l6q8f7p45606psa8bfdde4r612/62984985346.pdfIn PDF document text
    • http://thechelseaff.com/user_uploads/files/52449837558.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/dezazeziminopa.pdfIn PDF document text
    • https://sjalikave.hu/pictures/file/mawubudixusiga.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/f6b036fc55ce2c3daedd003c1bb07904/genexaramokatosalusizo.pdfIn PDF document text
    • http://collegium-connect.nl/ckupload/files/tuneper.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/c201a91571c8dce14d81c89e9645a965/66000939435.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210505142104_676817659.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bae3bed573e---dumiluvuraxusumokuw.pdfIn PDF document text
    • https://paardenwelzijnscheck.nl/app/webroot/files/ckeditor_files/files/juwodesawimejub.pdfIn PDF document text
    • http://carbonelite.ru/file/fadulejiluz.pdfIn PDF document text
    • https://baptistfriends.org/media/paruxuxesitovoj.pdfIn PDF document text
    • http://mavelikaradiocese.org/rapha/ckfinder/userfiles/files/waforuviliwixenalejerun.pdfIn PDF document text
    • http://www.parkwaytransplant.com/media_upload/upload/files/bisutomagugatiriwo.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/zugewoxerufovimelufape.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/97694032300.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a8a66ce9e---87911712579.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/81204202279.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f30ae57993---febadufipom.pdfIn PDF document text
    • https://zebcom.in/userfiles/file/14633691061.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/kutitogidujex.pdfIn PDF document text
    • https://landbar.com/upload/files/12407108400.pdfIn PDF document text
    • http://mrsgladysosei.com/clients/f/fd/fd76c46f75d01f7adbe86f52c2a5b8c1/File/jorasitalakakofekus.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/rdkpd4hh7elvmom3rootum6dm2/39292283553.pdfIn PDF document text
    • http://mvhs1964.com/clients/2/20/2030ff4f331b14c2016b95997514b7ac/File/49393719512.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/s6msf8p5l0oq259p7ppkb8orlv/bulimerev.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_off0000d109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD109 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91B 17732 bytes
SHA-256: 676e3357037162b7161b9f86bb12db7263dda6936da254a052c8e934196570c3
font_02_sfnt_off0001170a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1170A 11308 bytes
SHA-256: f92e82e7fa9802216d74308a15be85ca91933af28c77a63a4fae18c7ae4128cf

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