Malicious PDF — malware analysis report

Static analysis result for SHA-256 46063f358e6bb92a…

MALICIOUS

PDF

222.9 KB Created: 2021-07-31 05:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 52658d54dd415b9ad658c3a512a2e878 SHA-1: d27e61b6545b8c86a82fda7514eda305ece61c80 SHA-256: 46063f358e6bb92aabf8735e265f996712dacc7f556840f01ba7179fb7da7d9e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 0.9784

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aeb055195e---vajadibetusapabixez.pdf In PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c26388b64a---9524795641.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/85047522580.pdfIn PDF document text
    • https://coonvalleycc.com/userfiles/file/tejiti.pdfIn PDF document text
    • http://gfhs1978reunion.com/clients/56625/File/44562255673.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c5ab5d28030---13278346208.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/07/10/file/20210710_054915_106.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/530ad17125904da367189dbc8d3fb0b6/bazuxapufego.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd23229092---gugonog.pdfIn PDF document text
    • http://alaskacounseling.org/clients/8/87/870ae3779d21e956d596131c1dd113ff/File/gifotilonifuno.pdfIn PDF document text
    • http://eraldocomo.it/userfiles/files/1936607913.pdfIn PDF document text
    • http://cuiquji.net/d/files/11192702775.pdfIn PDF document text
    • http://cpspcb.com/uploads/files/rizerejojuk.pdfIn PDF document text
    • https://mides.vn/images/ckeditor/files/62169284305.pdfIn PDF document text
    • http://cooperclassof1970.com/clients/9656/File/28704365433.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/kisarunewuminirugago.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b48b9436c1---batemologafiwexog.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0b1f4d1f7---majamipuvim.pdfIn PDF document text
    • http://shssailors1969.com/clients/3/36/366f78b21138e0f8005dfe6cc5e09e30/File/47799550702.pdfIn PDF document text
    • http://adimhukuk.com/resimler/files/rusetizasaforutaxanelube.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/4sfslia3ubpg1i9q29j90241m0/karisufuzif.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/fdada2090b484dac48b2bf8096a54924/zoridafukaxusojotip.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/sotosab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=planescape+torment+annah+romance+guidePDF 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_off00030ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30CA2 11060 bytes
SHA-256: 624d7928da2e8edc9abfe9e87749edd77398482980ea04b4ca543e5f4093ba2a
font_01_sfnt_off00032600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32600 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00033e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33E12 17732 bytes
SHA-256: 9f9b685655becb628860b11c7c597ecc457e83700604a6866bb68f458d0a89d1