Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1322edc1d897ce9…

MALICIOUS

PDF

84.6 KB Created: 2021-09-05 07:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: f56c6832133f0cc9ae1efa9aaacee2ae SHA-1: 344d582e08f85788afa25c6f26b37e3093374bde SHA-256: f1322edc1d897ce9983b071d926ee6a2d78fd2d5acdb0720e30fd98a4891ae4f
164 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3740ec667---78799800675.pdf In PDF document text
    • http://omonetach.pl/foto/ilustracje/file/9069384403.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/vinufigeri.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/81060192291.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f8b9bce3f---43788088306.pdfIn PDF document text
    • http://brava-ekb.ru/userfiles/file/45966005810.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a736e7e791c---soxuvesen.pdfIn PDF document text
    • http://leebyenghun.com/new/upload/board/files/49306762509.pdfIn PDF document text
    • http://jonme.net/ckupload/files/biluwagilasikemusu.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/wodanedodujojafapufatana.pdfIn PDF document text
    • http://upoart.com/ckfinder/userfiles/files/89795352782.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f46cb6dd89---dutazokajaditobelaliwazaj.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/tesupi.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f55f13a44---valepopisogiboduf.pdfIn PDF document text
    • https://stalbeckers.nl/userfiles/image/file/fijelodepimozupatiz.pdfIn PDF document text
    • http://novena99.com/uploads/files/202108211043015184.pdfIn PDF document text
    • http://jiangsutravel.kr/userfiles/files/20210606_153855.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/14562084693.pdfIn PDF document text
    • http://splhardware.com/UploadFile/file/2021082002480073499.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed3b05baba---7706899856.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/hqp20voca95it0kmd1mgeo1ifm/9416508321.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=subitising+worksheets+kindergartenPDF 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_off0000e4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fcd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD3 18300 bytes
SHA-256: e925e64f731d2f8f44334dad5a7aaa6bec905d9fa2334c7749dd22e571289cad
font_02_sfnt_off00012be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE1 10976 bytes
SHA-256: 16ab13bec643acf8449eb4e151cc8ecfeb1f639c688eedb6ea4f0c4c5ed91931

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