Malicious PDF — malware analysis report

Static analysis result for SHA-256 d684ce4c5a62a89d…

MALICIOUS

PDF

84.0 KB Created: 2021-09-12 03:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 43be8ed6bf7be641861b2f5a2ab8ef84 SHA-1: 8e939822f7d759ef1c5644dbc2506842bf7b8853 SHA-256: d684ce4c5a62a89d58a8bf064020ad55b851b00346ffbae3f907400ebca05418
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs are likely part of a link farm designed to obscure the final destination and potentially host malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://master.plus/wp-content/plugins/super-forms/uploads/php/files/faa193dcbc89ca1f7bf1a7e03e6a9d9a/gajerukelatakosapabureb.pdf In PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb34a8b424---38129411015.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc1f9c3729---6413344353.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/sovitufof.pdfIn PDF document text
    • https://vialivonica.eu/userfiles/files/fafisurininazebotuf.pdfIn PDF document text
    • http://ongxoanhdpe.vn/upload/files/kiwavu.pdfIn PDF document text
    • https://ysh.my/userfiles/file/bedotadexalevagumu.pdfIn PDF document text
    • https://kcss.hu/korosi/userfiles/file/korawokob.pdfIn PDF document text
    • http://www.photonics-science.com/ckfinder/userfiles/files/pujifi.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/vigewilugavoko.pdfIn PDF document text
    • https://silverlabpupsforsale.com/userfiles/files/96001037822.pdfIn PDF document text
    • http://cybernet-ap.com/UserFiles/File/donepamepawamodalojofese.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/63f2ffe5d0dc454c6eefb034f8e49c72/vitexubixipelejuxuki.pdfIn PDF document text
    • http://valencia.thepokeluau.com/uploads/files/77325390204.pdfIn PDF document text
    • https://kominove-centrum.cz/media/files/file/bujefuduzawej.pdfIn PDF document text
    • http://struttur-arch.it/userfiles/files/11406993840.pdfIn PDF document text
    • https://socardan.com/userfiles/files/mixaruvuwuzuponifopufef.pdfIn PDF document text
    • https://easternresources.net/ckfinder/userfiles/files/44375894435.pdfIn PDF document text
    • http://bharatandcompany.in/ckfinder/userfiles/files/21865215618.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/jibakewuwurofoxedum.pdfIn PDF document text
    • http://technoprofile.ru/userfiles/file/vuguwe.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/gofitava.pdfIn PDF document text
    • https://www.truckersplantparts.co.uk/ckfinder/userfiles/files/gufuzile.pdfIn PDF document text
    • http://kingsbrite.com/kingsbrite.com/userfiles/file/witadogakasura.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=inshot+app+for+windows+10PDF 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_off0000e40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC24 10628 bytes
SHA-256: c83362d8afd59d8938c51f43d43b3ff3a0997cf26e489dd9f9d37b75443f6d13
font_02_sfnt_off00011477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11477 17648 bytes
SHA-256: 7877b2e95309c34abcca7a94b9c77455681df10d9d44a4047f03d37d3f447ad6

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