Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfc2399ed49f8772…

MALICIOUS

PDF

80.5 KB Created: 2021-09-19 11:15:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 998364cf46b34e1c8869ebbbedf924c4 SHA-1: e2c634404678e61e8d33072842ab2807bf2b1b27 SHA-256: dfc2399ed49f8772522c3716eb6745a6c4104a1f628753ec32197ba5752088c3
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs the user to copy and paste content into a command-line context, a common technique for executing malicious commands. The presence of numerous URLs, many hosted on compromised or disposable domains, suggests a phishing or credential-harvesting attempt, or a distribution point for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://go-pxl.com/uploads/files/xawerugavukik.pdf In PDF document text
    • http://popeyebio.com/upload/files/65430126451.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/q7tbf0kgo4874s08mpmvc6l9tn/bikidefifimifapekejamuxu.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/27848537054.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/mugaf.pdfIn PDF document text
    • https://eurotig.ro/file/77697537128.pdfIn PDF document text
    • https://flims.atelierleuthold.ch/userfiles/files/butiwupasigegadu.pdfIn PDF document text
    • https://chataigne-cevennes.fr/imgs/files/89901476743.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/54009401709.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/8064012ec14b3d82dc1ba0b903182a80/58826704344.pdfIn PDF document text
    • http://getdol.com/page_data/file/41693912506.pdfIn PDF document text
    • https://longhoang.vn/upload/files/guzefimizamuwexozifabozu.pdfIn PDF document text
    • https://jsptti.com/ckeditor/ckfinder/userfiles/files/dobixikufusif.pdfIn PDF document text
    • http://keacg.com/upload/files/mokipulavikafumenonixi.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/lotefes.pdfIn PDF document text
    • https://luxm.pl/userfiles/file/57540431460.pdfIn PDF document text
    • http://cesarrodarte.com/userfiles/file/nipasu.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/161346823bcf15---74457060512.pdfIn PDF document text
    • http://ngocphuocjsc.com/public/default/ckeditor/files/kepofafireketuvuniziluxal.pdfIn PDF document text
    • http://iphonedown.com/ckfinder/userfiles/files/vilup.pdfIn PDF document text
    • http://aadcnfgl.netsociality.com/upload/files/50783360931.pdfIn PDF document text
    • http://mobilahomedesign.com/userfiles/files/43501102973.pdfIn PDF document text
    • https://nucamsa.es/userfiles/files/jitorisadeximibisatagom.pdfIn PDF document text
    • https://shioturboapi4-xyz.com/contents/files/27824203004.pdfIn PDF document text
    • http://linza-market.ru/upload/files/muxugebijavujum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+clear+history+chrome+androidPDF 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_off0000d61d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2F 17792 bytes
SHA-256: 9bbfb03eb1450ab237e6b9888ab957ead8dfea8bfe5dae8e6b8297cc22a2d3bf
font_02_sfnt_off00011bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAD 10828 bytes
SHA-256: 39fde4b2a3ea8677fd3d95bdc16c0442bc1985145ead201e7ab8960f8e5a3507

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