Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a86c3ac577774f8…

MALICIOUS

PDF

87.3 KB Created: 2021-07-06 21:00:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 090ce7f59b4a3a8ad80f4b5c2e2be6ee SHA-1: 474888e41abbd4bd4461a6396377ff4e32891960 SHA-256: 5a86c3ac577774f846f8c32aab55ec24311d3c890e809d44786d387f13d308e3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to compromised websites that host further PDF files. These linked PDFs are likely designed to lure users into downloading additional malicious content or providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://drafthe.ru/uplcv?utm_term=how+to+defrost+frozen+meat PDF link annotation
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088b5b578aa3---ziremis.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/1476765012.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/87326369372.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b285cc0d88f---65729621371.pdfIn PDF document text
    • https://nedimgame.com/calisma2/files/uploads/tafoveroxod.pdfIn PDF document text
    • http://domplus.su/userfiles/files/paludowekajedovesugorenub.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/ftiv8eoturgedt3g61v0fb49b5/migaxewirata.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160963830dcb18---742619198.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac322aa612---35686492612.pdfIn PDF document text
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1bf664b09---livitijubazefoj.pdfIn PDF document text
    • https://ski-experience-japan.com/images/blog//file/bugodutib.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/ff2f34f2c3a8930ecf9eac0fd955be42/kufikifadopezom.pdfIn PDF document text
    • http://hoadon-dientu.net/images/files/10889925683.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/54844655105.pdfIn PDF document text
    • https://capecoralliving.com/media/file/96695264866.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/95716943424.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/50403309095.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/507faa7234a2a0c8fb6afa00d1aeee48/jafanimajana.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3e402145db---vepipazex.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/rijogurutamegi.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16083756e2d3e8---47269824210.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bde8a7baff7---balojifimodon.pdfIn PDF document text
    • http://tate79.com/clients/868750/File/mizakeloge.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/924222661ab164983e36b2eac1945ddc/jatebemorepixuzubunaraba.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/j8j4bveijmdtlf795aj4ski480/tatemovivulafurogujota.pdfIn PDF document text
    • https://cape-electronics.com/media/file/tinimevevaxozivagomikif.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_off0000f1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BA 18024 bytes
SHA-256: 3637368ac505c6cafb682a5e88f4f14ec1f65276b16a7083c4ddd3be70aaa023
font_02_sfnt_off000137e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137E3 10512 bytes
SHA-256: 53da81545f1891c3f2a7316e907edc1fccde0d378d9d6f033e706b91f2caff5d

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