Malicious PDF — malware analysis report

Static analysis result for SHA-256 03b026fda8c9712a…

MALICIOUS

PDF

88.5 KB Created: 2021-09-07 13:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ff3207022880ae89ce2bcc7ba4ad951f SHA-1: b2ab2695ac795c2ff3ad2d092e54da315258f4bb SHA-256: 03b026fda8c9712a16ed80364cd8adad75ff6439368dc36643b56f903f5186e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs that form a link farm, with many pointing to compromised CMS upload storage or disposable hosting. The primary function appears to be redirecting users through a series of links, likely to obscure the final destination or for SEO purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://secretinvitation.net/images/files/6342737889.pdf In PDF document text
    • https://ivanamihic.com//files/tixurelagalebu.pdfIn PDF document text
    • http://asfcursillo.com/clients/879797/File/jezunuposokulis.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/pobavutafebim.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/03aofbcsmkr046qbi3kfboj6e3/38550342243.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e336769777---vikezema.pdfIn PDF document text
    • http://thegioinoithatcamranh.com/media/ftp/file/xamovubaxexipinisoxasoxum.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210718042019.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983425bd32f---xelaviduxu.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/xegifinibolesitax.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/693df377e667a7ba63b246cb74298e7e/tojexawaw.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/14180401031.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/zetalutaripiruwularire.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/43c3b0b0122573f059aa16c1024d8b89/sonorojidujotuxup.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/jcprt04aa0t5uj915tg2jk9ml8/22398106196.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/1c5afceaf232001c32524291b636b287/97370651793.pdfIn PDF document text
    • https://batdongsandothanh.vn/luutru/files/64343732016.pdfIn PDF document text
    • https://masukpt2.com/contents//files/91462233060.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c78098a4969---42752933776.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/9e6vbafko0b4da577fegvdko2u/widaxomaf.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/zowemi.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16091cba88c182---4615301528.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/mafulokuxidewurokakovuf.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d430d4d5ae---rizibazugodebapozofakis.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/sekidizapugapozogesaturex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=bkdrluhar+pdf+booksPDF 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_off0000f5e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E1 17864 bytes
SHA-256: c8af4ad58fa24857f8ca458bb186a4da8f66e6195db397aeb8cc84791306843d
font_01_sfnt_off000123da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013bf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BF1 10552 bytes
SHA-256: 1394c0d143c854227ac9aa8f4a868ebd831066ac7741e2d04ff7c58652ce0e51

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