Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd3672366e54bdfb…

MALICIOUS

PDF

74.4 KB Created: 2021-09-01 02:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: ad0f8014befc796c0a0a4bd3e70a8dac SHA-1: 5abbd67f49d59900a00d8238785a2c997808f000 SHA-256: bd3672366e54bdfbdc7d44efa02be224b62c2b23403cad5715e78427c4a2833d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/730a7a578ad6f2a57b69a07229d5832b/90841199844.pdf In PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/c1cd9f62f3b66ff7423603976250cead/tanijetaw.pdfIn PDF document text
    • http://nikacarpet.nikacarpet.com/My_Project/Hamishe_bahar/ahar_img/files/biguzapavurasek.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/mofufuz.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d241ba1e9be---nevaxujo.pdfIn PDF document text
    • http://pogservice.ru/userfiles/file/wujuviwijuganidogezebuv.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/65c071de351d57a4b5e1b9e39176493e/sitem.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/9274802794.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/xezotazoxedimevovi.pdfIn PDF document text
    • http://spharma.ua/files/file/mebaxuro.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/534173e396852bfbf6cf156747a11798/72501648840.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d65607929d---wupanovafulowudikako.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160734b72f068a---kamefo.pdfIn PDF document text
    • http://woods-china.cn/ci2/userfiles/files/20210621040737.pdfIn PDF document text
    • http://f-kcc.jp/user_data/userfiles/files/72387636721.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/47f78f9797f07293c6259de7272440c3/52491390154.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/e6ode5g4vshsagtuf422ed9ci5/75718282967.pdfIn PDF document text
    • http://cocoal.com/uploads/file/devuduwit.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f7dfd9b0d---95113650707.pdfIn PDF document text
    • https://www.luxboss.com/ckfinder/userfiles/files/gotizoguzugak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=circuit+theory+mcq+with+answersPDF 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_off0000bd9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD9C 17600 bytes
SHA-256: f7413c865c554703286d7de9e1404ce0c418c5fb76fdd933db00531902e8bbde
font_01_sfnt_off0000eadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F2 10928 bytes
SHA-256: 861e6379cc10218098c66e7cae9ea4414dfb91c99a03c0038e35cead972df607

Open this report in the interactive analyzer, or submit your own file for analysis.