Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e333d276f34398d…

MALICIOUS

PDF

73.9 KB Created: 2021-09-14 02:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cdb14a30db4965fa02475ed06b662867 SHA-1: 792992c3254a33219883baecf9b056cd8b9a9f4a SHA-256: 0e333d276f34398d66640035b90a5508569c443e7e1f1cb7c6c0a5f13b32c809
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://tencanpowder.com/d/files/9821217006.pdf In PDF document text
    • http://paintmaster.hu/js/ckfinder/userfiles/files/tuboratuz.pdfIn PDF document text
    • http://sissonne.hu/editor_up/tukawolodanavito.pdfIn PDF document text
    • http://nanouklid.cz/upload/file/komawes.pdfIn PDF document text
    • https://bliznacite.dvsportbg.com/files/jaxidirona.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/4m41uo7gjbv0k8sgecluuo008n/nexofiz.pdfIn PDF document text
    • https://sabagdasarov.ru/upload/file/32129026757.pdfIn PDF document text
    • http://kurier48.pl/files/userfiles/file/sumuguwurabodumej.pdfIn PDF document text
    • https://saatyapi.com/upload/ckfinder/files/xuvuturesepikenunelo.pdfIn PDF document text
    • http://swiftnb.com/ckfinder/userfiles/files/49566841960.pdfIn PDF document text
    • http://abwlondonblvd.com/uploads/files/kitib.pdfIn PDF document text
    • http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/boraripupesemujodovasov.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/54294842924.pdfIn PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20210906_F3261C0A565190D3.pdfIn PDF document text
    • http://fotografieindex.nl/images/uploads/99506646769.pdfIn PDF document text
    • https://hsiaoying.com/userfiles/file/jozeboz.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161390b705e9f3---54099462327.pdfIn PDF document text
    • http://lhdrum.com/User_File/UpFile/file/20210907124535_MTAxNTY4NTkzODM=.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/b28ba1de5e3371b4e2434f7f45980d30/69823915880.pdfIn PDF document text
    • http://ingegneriarossi.it/userfiles/files/mafofamorup.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/28999323502.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16135c516a368d---377586951.pdfIn PDF document text
    • http://didula.ru/img/file/98482176061.pdfIn PDF document text
    • http://balie.overeembv-profielen.nl/upload/files/90659965255.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=app+essenciais+para+androidPDF 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_off0000be23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE23 10344 bytes
SHA-256: f5663252fffb55f29e5969ba3a0c8c397146a1b851da2bdee14b8d349dee6c38
font_01_sfnt_off0000d59b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD59B 17776 bytes
SHA-256: f20941f1b054239fa6fff0af3072c8584b9f03f91e579697ac6fbb2ac0f4633b
font_02_sfnt_off000100c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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