Malicious PDF — malware analysis report

Static analysis result for SHA-256 fea1b1a10e347f9b…

MALICIOUS

PDF

93.8 KB Created: 2021-06-29 15:27:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2ea4b9c12f5d9a5a0cd954d5afc1152b SHA-1: 9bef54196be85ea3da76a46afeff24782b80ccdd SHA-256: fea1b1a10e347f9bea4d5ce6524d92707a82445d34c0afe1b36992dad4a26384
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with known phishing and malware delivery techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://maristaslardero.es/userfiles/file/80693018605.pdf In PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/97277387367.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/kks7vio5rrfka9kgb3bpog493i/35846448950.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/baniduvutipopapixurot.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/707ac975ad60157131c5a7b6c170701e/rabodebevudafo.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16214405799546.pdfIn PDF document text
    • https://leavingcare3plus.ch/userfiles/files/ponisaw.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160987c4d2f94a---61018956719.pdfIn PDF document text
    • http://allg-gyn.ch/userfiles/file/7799009320.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/993baff6ce5891f06d1c775a5c59ff64/puvitagekodopomon.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/dqsv1vf420gp838isprmpu9j12/63974752815.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075829749068---mewix.pdfIn PDF document text
    • http://anthonyellisonfamilyreunion.com/clients/f/ff/ff850d76676c1858bf5e443b7a907d3b/File/gedatodivadediso.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/82257328324.pdfIn PDF document text
    • http://hattingtoemrerogsnedker.dk/userfiles/file/16368686429.pdfIn PDF document text
    • https://songhong.info/userfiles/file/49743832789.pdfIn PDF document text
    • https://kasihpaham.com/contents//files/56172358937.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/fojezevuf.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/81065196437.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/44780498542.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/popolire.pdfIn PDF document text
    • http://haozuowenwang.com/imagefiles/file/zevuxazudozepivufu.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/tefigozutigavevok.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/tq9ujnot6ls5at8tdbajb1ggqp/48290444099.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=programming+languages+principles+and+practice+3rd+edition+solutionsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AD 16392 bytes
SHA-256: 439f91fc52918ec11de7c10fc66f42d556e3ca0baf24f0cec7590a9fe4e8f18d
font_01_sfnt_off000106d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D6 17460 bytes
SHA-256: 99bb40d080c90c823dec8fe7c52cc5c6be0b722a73cd63d02979de111a5b7814
font_02_sfnt_off0001348f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1348F 11128 bytes
SHA-256: 8ff6bd857b9d5e7abc8db4e1bbc601303f65fc3ca41d94dadbf4962f25fb44dc
font_03_sfnt_off00014e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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