Malicious PDF — malware analysis report

Static analysis result for SHA-256 f733f9e60bf92f6d…

MALICIOUS

PDF

86.1 KB Created: 2021-07-09 14:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e3238085e4e93ce9cc9b824572a6a409 SHA-1: c4550292d3616f5852d1e72a34d7e39863236c67 SHA-256: f733f9e60bf92f6d9622adaee1e954ede94179514306e721ffdc42118a8ee2a3
156 Risk Score

Malware Insights

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

This PDF was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links to compromised websites, suggesting it's used to redirect users to malicious content. The document body is unreadable, but the heuristics point to a link farm strategy, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/961ee0e92ac6bf3cf347c9830b31abf3/48862543099.pdf In PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/23724283293.pdfIn PDF document text
    • http://sumtinathholidays.com/admin/uploadfiles/file/83707623542.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609bbdc777164---8970067303.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091172c6e5bf---80128405418.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/kre43fo83cjbfpubjdqnnfv87c/babulo.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/epj0132648f60mukel21ipa7k4/62181730161.pdfIn PDF document text
    • http://clarkstownhs64.com/clients/2/25/255c49a504cbad61718694d8b78dfcdd/File/66969070886.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/f401ed3554138a3938084a5c75486bb3/gedud.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/38118640053.pdfIn PDF document text
    • http://twothirdsmajority.us/clients/38522/File/sabusibibovifopukozirivus.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/baec9ea5edde8abb0c3d3af48e427ae3/26692096959.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/23373568298.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/dategabidipatigonozawi.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/0e37bf276484bbdcd1f7aa6275c5ec5f/87728343658.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-6-29/20210629133619149597.pdfIn PDF document text
    • https://drvishweshwari.in/userfiles/file/radogapitazubukudusoniw.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/fudotivinotubu.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6f0b9ff11---lusemozipixarozan.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/895bcfc3209e9868975386e563fd35b1/75880979178.pdfIn PDF document text
    • https://music-group-store.com/upload/files/buxalikamajaxamevarerego.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08c0bb1e9b---86370361806.pdfIn PDF document text
    • https://gachbinhduong.com/upload/file/tegimobit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=4+types+of+mysteries+rosaryPDF 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_off0000edcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCB 17368 bytes
SHA-256: fee006c83248bbe8ad75e6f1be11b88a2b3b29f31375dfcecdb29f412f2c4b24
font_01_sfnt_off00011b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13389 10464 bytes
SHA-256: 0a2f85a2d70c1cfc9a3a0d0cb212da244c36eabb3c12355f91a285576ac14376

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