Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf9b9446fc798af…

MALICIOUS

PDF

81.7 KB Created: 2021-09-07 01:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 17a38371d9a396d4a6a41b091dc2055d SHA-1: 9a18c01ca415a9a056ba34bf17c4d2d81926b81d SHA-256: bdf9b9446fc798af66e7e85c2bbdd5fa40ae89653c8907372684a09bda927de7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed for SEO manipulation or to distribute further malicious content. The presence of these links suggests an attempt to lure users to external sites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://palcev.ru/userfiles/file/75165790753.pdf In PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd53c884e4---nemomirelakewoxavumagixu.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/sudopazewolujugozifup.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/90183856328.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/5ff0027001eb7f3f0db4f8c16d6aac24/22504254259.pdfIn PDF document text
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/komumijoze.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/5b1b2de6917d0ad569a58cc9017b70d2/jewavoziviloritavowuv.pdfIn PDF document text
    • http://ccsup.co.th/uploads/ckfinder/files/pusafagidipejasekugesoxu.pdfIn PDF document text
    • http://dgxzz.com/uploadfile/file/76403608736.pdfIn PDF document text
    • https://le27.fr/docs/file/poweduzinakafawobabo.pdfIn PDF document text
    • http://ecompletecontact.com/ckfinder/userfiles/files/suwuwakozovobe.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/7c6e8092caab7fe906a97ee293f0eefa/tipoxozujonidoxibirifosa.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/c3efc0320dfe0cc2fc4e53a0f4d17783/fuzobaj.pdfIn PDF document text
    • https://globalcircle.club/userfiles/file/tujifovasatedurababa.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/31072919416.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b74de92464a---polulebisevowewu.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/vojowoxofexumo.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/600e8bb7f0a848602b12dff793fa1e42/95424899843.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/57618987232.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7e6cdb3d1---87940821044.pdfIn PDF document text
    • https://badeluxe.com/userfiles/files/bizapozama.pdfIn PDF document text
    • https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/masanukaxedomega.pdfIn PDF document text
    • http://kavernoklub.com/campannas/file/navepum.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b558f8722cd---satiwezukitusoxazekorugo.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/gezusatanalevelebujepax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=hydraulic+pipe+bending+machine+manualPDF 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_off0000d860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD860 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF072 18440 bytes
SHA-256: 7f008363b0e7fc7914b63f6839dfa5d950bf4ae1c011901db9456519f83bd192
font_02_sfnt_off000120b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B2 10920 bytes
SHA-256: af2166d64dc0feba8857677425d14e824a20e5b2dd4f93dd31aaa4eb1ee0a338