Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd7c7a94d1b371ca…

MALICIOUS

PDF

84.9 KB Created: 2021-09-15 18:26:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a25a0d61771364bd6d66abede1eedf38 SHA-1: fd74bd136c312c1e9247b4f5283a5d49f6f9fa10 SHA-256: fd7c7a94d1b371ca46e48265892bc6d6c7bba303d80e5d314a14f71f5c34438b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The document contains a link farm pointing to compromised WordPress upload storage, likely intended to trick users into downloading a secondary malicious file. No scripts were extracted, but the presence of numerous URLs suggests a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141895f05dce---10884049791.pdf In PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612f10b9315e6---rugupinufupixapepobirepu.pdfIn PDF document text
    • https://ratodua.com/contents/files/68582813530.pdfIn PDF document text
    • http://jlssj.com/qianzi/upfile/case_editor/file/tedovipimeruzivevo.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/etklg4749lb71ii13fgbcn7390/37880284944.pdfIn PDF document text
    • https://bunian-co.com/other_files/File/26220055382.pdfIn PDF document text
    • http://chornakorn-packing.com/ckfinder/userfiles/files/putigemujaf.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/72343288325.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/161362023087ad---gudobizusufuwu.pdfIn PDF document text
    • http://mitcostruttori.it/userfiles/files/53129164832.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138b6ee89c71---95115289433.pdfIn PDF document text
    • http://srub-servis.ru/userfiles/file/jazememogasobelefazisowub.pdfIn PDF document text
    • https://eastmanllc.com/ckfinder/userfiles/files/28013694096.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/nowag.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16140a9292e6d4---divuvusuderi.pdfIn PDF document text
    • http://ambulatorioveterinariomariani.it/userfiles/files/foderodevatotifopax.pdfIn PDF document text
    • http://sinice-rasy.cz/files/file/zegifezifu.pdfIn PDF document text
    • https://dafelia.com/files/20858305985.pdfIn PDF document text
    • http://demo-enriquemora.shopcloud.es/ckfinder/userfiles/files/25035594219.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/52608702499.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/5f161e748e615ab727cd178cf7eadde3/zelire.pdfIn PDF document text
    • https://www.hermanosvalerorecio.com/ckfinder/userfiles/files/kunubiravonivexotowumisi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=download+nitro+nationPDF 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_off0000e75d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75D 18676 bytes
SHA-256: 19b6313732108e07b71770dede1913846cc0b972f659410fb654010357269719
font_01_sfnt_off000117de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF5 10028 bytes
SHA-256: fe15b75593580b1739fe02e42c416fa2cff6d6922ca52c245649a3d466db9907

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