Malicious PDF — malware analysis report

Static analysis result for SHA-256 147cefc9d83342f5…

MALICIOUS

PDF

89.8 KB Created: 2021-07-05 15:35:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 2e7847f3dfca31a97af8abe57b322fae SHA-1: 75e7bf138c015372cf50629e8d41e7445a25e0f5 SHA-256: 147cefc9d83342f5c7be80c8948b41f3c1d6b57aa3bcc8d9bc0611a58ca1b49e
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the interpretation of this file as a lure to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://sammyuriasproperties.com/userfiles/files/gojifiji.pdf In PDF document text
    • https://akapacha.com/userfiles/file/botolek.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/1fbb45aaf6a3f40e29d125b2007eb6c8/83440775553.pdfIn PDF document text
    • http://flirdining.com/uploads/files/24686900259.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/nulusujulunakimixokewan.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/kebazarolawali.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0766bde68---worijavojugenif.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6ae7a32c1---81971388086.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d950b6056d---23082563147.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e8996dc62---foxavogima.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c94d8c5360f---47339914743.pdfIn PDF document text
    • https://ilcaminodaugo.it/file/8938380434.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/26096152085.pdfIn PDF document text
    • http://koreaseowon.com/ckupload/files/96997264586.pdfIn PDF document text
    • https://www.passion-rnd.com/upfile/files/2021/06/24/kemis.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/2779e0531f0edec70298444f4b9afa86/xufivelodi.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/f293f71ffbd0a25b89e4e3a541d4207f/87552596882.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/sabaniborunametagu.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ac86ecf27---dijiritinudegiganenudokap.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/bepebakiwe.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/gjfff8djo89jch0sm0pa86hfrs/wenerogufikaxurizuzazez.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/simixedibumemurezo.pdfIn PDF document text
    • http://mytmbc.org/fckimage/file/fevini.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/d94ae257955e63330a265d315bdb386f/dixamagonewik.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f021d4b1e0---nodigagosuguw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=ib+math+sl+worked+solutionsPDF 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_off0000fccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000114df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114DF 16900 bytes
SHA-256: 27b6a85d0390d0c46c50a0c7ef3aff5a88045595e697dde871fedde2bfbd4bfe
font_02_sfnt_off00014103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14103 10880 bytes
SHA-256: 18f2f5f732ccf4cd1f34ada13713ecd6991964b0fefa43fefe7bc1a2afccb3f5

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