Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dea993a1f80cc2b…

MALICIOUS

PDF

71.5 KB Created: 2021-09-30 13:36:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 2006564e63daf7a84cd62c24bd17d046 SHA-1: 2567a0b5c83b5d67568d3fa21e9c33fab90f3b76 SHA-256: 6dea993a1f80cc2bcfda0dcf2213db2b1933840b442e21260e14e2b2051fba84
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The presence of PDF-specific heuristics like 'PDF_URI' and 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this. While no scripts were explicitly extracted, the PDF structure itself likely facilitates the redirection to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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 https://cructi.ru/uplcv?utm_term=guardians+of+galaxy+2+watch+online PDF link annotation
    • http://hairfibers24.com/upload/file/16514452076.pdfIn PDF document text
    • http://96rangjai.com/userfiles/file/nepikodididi.pdfIn PDF document text
    • https://homecareangels.ca/files/files/files/vanegepa.pdfIn PDF document text
    • http://dongphat.net/upload/files/21290886903.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/tabenoni.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/44710b24177ce9011fb23d1cd4a6f753/salomenirovesesutoxideto.pdfIn PDF document text
    • http://etalentlink.com/uploadfile/file///2021091317054681.pdfIn PDF document text
    • http://sun-green.be/ckfinder/userfiles/files/29719488537.pdfIn PDF document text
    • http://www.mediagrand.hu/data/editorfile/84923981672.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/83542967632.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/66338620353.pdfIn PDF document text
    • http://ecosdaliberdade.com/ckfinder/userfiles/files/wabunutajineduda.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///mirux.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/bcc5dcde35a7a7e90aea383859d1bd76/supaxopesipebavi.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/52e5d8315e2ceab9a28439ba1411026a/zumav.pdfIn PDF document text
    • https://luatkhangthai.vn/upload/fck/file/32093220518.pdfIn PDF document text
    • http://naturestuff.nl/siteimages/file/2734752966.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/sumagafaverosegefibelil.pdfIn PDF document text
    • https://www.osteopathe-montpellier-sud.fr/ckfinder/userfiles/files/69159333883.pdfIn PDF document text
    • https://ppntassone.it/dati/upload/file/zelijoxo.pdfIn PDF document text
    • https://ksuskalology.com/images/file/42792415080.pdfIn PDF document text
    • https://flomogroup.com/upload/files/kedeborenevefitubomasigif.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/53521129599.pdfIn PDF document text
    • https://norservis.com/files/files/39319170469.pdfIn PDF document text
    • http://mvsexpo.ru/admin/ckfinder/userfiles/files/tevidowuvojuf.pdfIn PDF document text
    • https://go2germany.ru/files/file/wevuj.pdfIn 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://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_off0000b558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB558 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6F 11316 bytes
SHA-256: 7fccd5afaada55650ff695d4b3e6dc625d33024a361e61b09cc3066728acc471
font_02_sfnt_off0000e7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EA 15712 bytes
SHA-256: 511d1f31013a6ea8c5911a76aa284fb9b8516cd9b03e30be9ccd41255ce3ad61

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