Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c413cac66b90602…

MALICIOUS

PDF

93.0 KB Created: 2021-07-07 02:31:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 65b3ca7e7936974bc0e08be58968e27d SHA-1: dd3bddea1092d3bb59055ec238a658eceebb295c SHA-256: 9c413cac66b90602f5a49c406519aed616a71d5a08a7efe73b3311f3e7a572fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9927

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=free+online+conversion+of+pdf+into+word PDF link annotation
    • https://nepalipublisher.com/ckfinder/userfiles/files/80276458213.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/63025019283.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/a20ce4fe74dc3c679840e68c74537091/tedomixasud.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b931594a2f7---23891054444.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/47dc45cbee4c6c144ab9300c92f7f0f9/xisijiviguk.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/wevenukuve.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/41414002605.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c12829d2637---53017124530.pdfIn PDF document text
    • http://nano-vip.com/ckfinder/userfiles/files/1725355221.pdfIn PDF document text
    • http://transcash.com/ci/userfiles/files/53857850242.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/50801749493.pdfIn PDF document text
    • https://menu2uplus.com/images/file/46169192955.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/7c16a71dfda2aef5dffadff128a4e20c/pixunoradadolobepawinaxax.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/e4b11b94440485f987af1ae73da5004c/25077066682.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/dvhv33410u818h3rbo3qt7vj4u/35644416002.pdfIn PDF document text
    • https://daxitrip.com/basefile/daxitripcom/files/kemavafoxawuwexutokegivi.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/8cf7e942deb1132c64d054b939bd2a57/loxofu.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/e6374b902dbe0b00ede2d73eac0ae521/50064774488.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/vafoxurupugifigisodaru.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/pupekesib.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074fbf86177f---29624905205.pdfIn PDF document text
    • http://www.kymenhome-etsinta.net/tiedostot/files/93952801622.pdfIn PDF document text
    • http://anthonyellisonfamilyreunion.com/clients/f/ff/ff850d76676c1858bf5e443b7a907d3b/File/gedatodivadediso.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001041d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041D 17500 bytes
SHA-256: 47173ee8c2e0f604a04dd57a72a9a9ccdf36908830be9ce4ba9abf0d5ab0bb3b
font_02_sfnt_off00013154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13154 17940 bytes
SHA-256: d9839440ef153e28e9bd249e9ec95f63fb9041c6e97a9b6d97cde83bbda53737
font_03_sfnt_off00014c2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C2E 10580 bytes
SHA-256: 0aeb2139d989efa7af2e69f71046653885e117039f12da224909f61b1b3ca352

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