Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dbe9e2ee5ccd68a…

MALICIOUS

PDF

73.5 KB Created: 2021-07-03 05:36:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6872cb0694450218d984797cd39e53a6 SHA-1: c2de18cb9f5c16e2f9e5f3860a96730a06e74976 SHA-256: 0dbe9e2ee5ccd68a8634c95249a1d3d532a9d2776f0bb82dbe794fcfc7d6fdc0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a link farm. It contains numerous external URIs, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to lure users to malicious sites for phishing or malware delivery. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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://geoodwierty.pl/files/file/24692906090.pdf In PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/zoxisuzudizuzavusiru.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/6cf0bd2620b9ef36a517504a2d5371b2/47406211610.pdfIn PDF document text
    • http://wallsfamilyreunion.com/clients/876683/File/8458777357.pdfIn PDF document text
    • http://zxsolar.com/d/files/bekijagewado.pdfIn PDF document text
    • http://thessalonikiflights.com/files/files/67089136494.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3ed44f7de---mejuzo.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c055cc4a9b9---9148358673.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b10f95c5d9c---rexolaperapududiseduxet.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc5f865603---65561078633.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/lodidepefewabuk.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/maj0c8ucqgumrfk0tha4ih3t09/viluz.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160846f2e39ad7---feramujivirepofurudeteman.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/80f1bd7a570a21403d95a0bd7a7421ec/kamazop.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/p4s0q0g0tgu60l4tnbss2d6p13/28369131906.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/2875366722.pdfIn PDF document text
    • http://www.vikingmaterials.com/img/56493062556.pdfIn PDF document text
    • https://castel.ro/userfiles/file/69760209388.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/554f443f93f78c8e62184848008c3fa1/miwemokasobowusaj.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b44eb506a09---10293381911.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160987c522630b---dokifijukawilavubegonam.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/39344012751.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed2f6edefe---kupasodovugew.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/kasilisisubatiwimas.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc74dae192---logakakugijok.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8016a28b53---wanudodoxugedukusid.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/zakuzuwedofixi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=three+phase+fully+controlled+converter+fed+separately+excited+dc+motorPDF 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_off0000bca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BE 11232 bytes
SHA-256: 16bfc039c2028990551d07939d94fbff3a80b0c24e40e7bdb00a47d73a83c264
font_02_sfnt_off0000eeee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEE 15852 bytes
SHA-256: fc03a2d9def1a347dfaa021e8432e886a42538968d5fde3268100a8f5b895d51