Malicious PDF — malware analysis report

Static analysis result for SHA-256 0963e18245baf1bc…

MALICIOUS

PDF

83.1 KB Created: 2021-09-05 05:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e0dfae067f792efce24528152c094789 SHA-1: e563b39de2f8f2a83e2747e0e81f932a955828ce SHA-256: 0963e18245baf1bc9140d4571bd5d2ef9eaee6c0b1c1709c6e1a9934a588190f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many pointing to PDF files hosted on various domains, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the nature of the link farm and the detection results point towards an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://tisuputih.com/contents/files/radezujiwiredolifopodiker.pdf In PDF document text
    • http://enewind.com/pliki/file/piruxuxulipexevugimoro.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/072206454305.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/c14e8d4ed021b252a148370bcbe39c5f/vedebedugibo.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/f7f03971f701f82a8aa8d15624c6c96d/89264367443.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/bojivopojuralokixot.pdfIn PDF document text
    • http://gryfarmerskie.pl/pliki_wyswig/files/ripobewogokenupefudof.pdfIn PDF document text
    • http://dreamsurgerycn.com/ckupload/files/rokarusoniwisuvixute.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/65476405887.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ed71c584f3408633e27ad349d773a4a6/45721923841.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/sja76bllivg065p97ovisol07v/vonunikili.pdfIn PDF document text
    • https://ohcsi.com/ckfinder/userfiles/files/ketaxafekajafi.pdfIn PDF document text
    • https://cecprint.com/images/file/fipebume.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/41303897514.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/6465a1532144311f81a530411141b119/gapojodidezafimet.pdfIn PDF document text
    • http://kutyasturak.hu/images/files/79746243803.pdfIn PDF document text
    • http://secretinvitation.net/images/files/fevakonotosija.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a6571aed4e1---46068411750.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/fazanevajofemugarate.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/76460303710.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160809c45ed73f---68909237176.pdfIn PDF document text
    • http://xn--90afqerdlt1f.xn--p1ai/admin/ckfinder/userfiles/files/76039954959.pdfIn PDF document text
    • http://donovaly-ubytovanie-safran.sk/web/userfiles/file/sageroke.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/73024056450.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc1477a270---19366301809.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/41263003184.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=prova+ifpi+2019+pdfPDF 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_off0000dc63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF475 19308 bytes
SHA-256: 5e64a4561f79c123012a0b24d96f5953e8ffa91f3396c21c655bbd1f7116d998
font_02_sfnt_off000126e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E3 10472 bytes
SHA-256: 9259da24768291444a05192fc4be97ca4bc2ff76a95ae615cad9f64de27322e8

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