Malicious PDF — malware analysis report

Static analysis result for SHA-256 2407ffcc24ea74bb…

MALICIOUS

PDF

95.1 KB Created: 2021-06-13 21:21:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4e0acf109267451b274ee13df92b8b45 SHA-1: dca7625be17b562d79c449b74f828ed98c9aa520 SHA-256: 2407ffcc24ea74bb5f611921086c6de0e7daa051bf24d985f83b6dc95a6f6dae
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 0.9990

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://huntic.ru/uplcv?utm_term=pookal+pookum+harishankar PDF link annotation
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae2bfed256---bobavaluxisawusukejivo.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608118f08c48d---mamogukefuwovigaxevevilag.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/78844312468.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b003b52bbe---motibufura.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/48e4e6123d8c025a8900f79ec1de7945/2641714805.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/9irhrue565q6o23r1vc0s1tqf1/77562374356.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3fafc94dd---35292347933.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/b5e95ebd879e7dba0f5d415f1b02ed14/485430613.pdfIn PDF document text
    • https://belloverde.net/emailer/file/45554026647.pdfIn PDF document text
    • http://gyobel.itpublic/file/linavimuwigaxigepe.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2fcf843556---15481548913.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/60016842336.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/c6f899b1daf583f21a2817ebc719a138/zowebezuwewosavuxugu.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/fff7483ca4ddcfb69408a8333a435650/23279294468.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce8a29e2db---68522534989.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00010aa2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10AA2 2584 bytes
SHA-256: beb84ef78cc9a808af90b38dedbac62c1f62f29d059a40164207d5a322bf2e3c
font_00_sfnt_off0000de2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2D 6588 bytes
SHA-256: b3260a8b27c40a1c9408c40b3dcfb9ec9ded560232013cbc1ca8de37ebb5a831
font_01_sfnt_off0000ee76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE76 3152 bytes
SHA-256: 7cc558580049efa567d7c459346496d7985059a692ee02f4f7e26ba4c5979a21
font_02_sfnt_off0000f964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF964 5124 bytes
SHA-256: b7d5d73dbc4a6e985c3249bf4eb6dd39bf0104fd5c6bade242f48ef01f16808a
font_04_sfnt_off00011586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11586 4052 bytes
SHA-256: 7e77808a3de1c296e22ba673d3c46605af4593a57c8a2d18189b303b46ecc3f3
font_05_sfnt_off00012430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12430 13560 bytes
SHA-256: 09365c927b29b460fc9ba9579114f95cbeab3bfd78225e2d79242456d447b444
font_06_sfnt_off0001500a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1500A 18776 bytes
SHA-256: dabf0ccc451caf4864c9b22ca91318a92e8f625b469dd0561edf59b451c7a792

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