Malicious PDF — malware analysis report

Static analysis result for SHA-256 795d06602b0350d7…

MALICIOUS

PDF

78.6 KB Created: 2021-09-17 02:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b47c3f77caa6bc9d38069aa77ad367ff SHA-1: 0efe598d7e3b745673908b7bc03e90bfd35c931b SHA-256: 795d06602b0350d7aec5516bb140b9ae5bb38ab60cb1ecc84e81b4bc0c5fffc2
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm on disposable hosting. The PDF contains numerous embedded URLs, suggesting an attempt to redirect users to malicious sites for phishing or malware delivery. While no scripts were explicitly extracted, the presence of many external URIs and the 'link farm' heuristic strongly indicate a malicious intent to drive traffic to potentially compromised or malicious domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://catamma.ru/uplcv?utm_term=how+to+search+a+barcode+on+iphone PDF link annotation
    • http://tysons-cafe.com/uploads/files/88282880240.pdfIn PDF document text
    • https://lmbri.com/WYSIWYGImage/file/22098002874.pdfIn PDF document text
    • http://swvocal.com/data/se2/file/73545836135.pdfIn PDF document text
    • https://mundolibre.cl/uploads/userfiles/files/27545828641.pdfIn PDF document text
    • http://guidesdugrandlarge.fr/images/import/file/tesapuwaxitupa.pdfIn PDF document text
    • http://www.agenbenangbandung.net/file/difadotegowaxevake.pdfIn PDF document text
    • http://saxonrt.hu/img/userfiles/files/73376039234.pdfIn PDF document text
    • http://kezmosas.hu/files/file/ragig.pdfIn PDF document text
    • https://phunhai.net/upload/files/binopofaliletila.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/tamovevegedekoxobisuvi.pdfIn PDF document text
    • http://thuaphatlailongthanh.vn/upload/contentFile/minhchau/file/64118435523.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/sadorurubivexajepodabaf.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/161418f2adf290---57807526218.pdfIn PDF document text
    • https://inprovitvenezuela.com/ckfinder/userfiles/files/41557388625.pdfIn PDF document text
    • https://miraclechuppahs.com/userfiles/file/giboxogomubifajufo.pdfIn PDF document text
    • https://kccegis.com/upfiles/content/file/20210909012331.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161427d0aed455---ranuxobakaratixoxuroju.pdfIn PDF document text
    • http://vnationwide.com/userfiles/files/pubabubojopaxis.pdfIn PDF document text
    • https://siangyun.com/upfiles/editor/files/pafowatet.pdfIn PDF document text
    • http://productinfo.in/konadnew/userfiles/file/jiguwegivizinavelivek.pdfIn PDF document text
    • http://thehedgerowchronicles.com/ckfinder/userfiles/files/vivamulofizeko.pdfIn PDF document text
    • https://esofagopisa.it/userfiles/file/85010237780.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_off0000d058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD058 17124 bytes
SHA-256: fa8b9690087a32601954a3e1ab6444f6a75b0200bfff742e9fabc1ca439b5e7f
font_01_sfnt_off0000fc3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3F 10780 bytes
SHA-256: d1ac73aefedbd34294f18c2409a07c2fbfa779a66904382d8894fa518ce5a76b
font_02_sfnt_off000114d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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