Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec59678a2789823…

MALICIOUS

PDF

85.4 KB Created: 2021-10-09 19:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: e3ed4bc805dad25173ac7fcb70c8133e SHA-1: 32ccfb81d87e912cb1b68dadd06b7addbfa9f474 SHA-256: fec59678a2789823d739e89729b5e7dd5c9679e55270cc06182b6e8a6e05ee66
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and disposable hosting sites. The primary goal appears to be redirecting users to external, potentially malicious content, rather than delivering a direct payload within the PDF itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://ekopaczka.pl/imgbrama/files/zanulevixisujenanivagi.pdf In PDF document text
    • https://www.aifimm.it/admin/inc/ckfinder/userfiles/files/tiver.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138101921367---40867322610.pdfIn PDF document text
    • http://jn-zhsc.com/upload/55885045824.pdfIn PDF document text
    • http://qamsar.org/userfiles/files/zipedufoturexeremobefoxif.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/winagudise.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16155b0ec08658---kobodeturivokelegirerov.pdfIn PDF document text
    • http://ewhamd.net/upFiles/ckeditor/files/gugetubobupusakozidulera.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/zixovelezumoduzikodisevop.pdfIn PDF document text
    • http://101eyewear.com/luutru/files/63667166830.pdfIn PDF document text
    • http://ntep2008.com/UserFiles/File/9832815647.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/6ihue35g7dmfau29ekvm0ke9f4/koriwigikejifazezixebepu.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/6c70c22df8078208e5ccf8d0a814709a/varenepa.pdfIn PDF document text
    • https://lbk-ingatlan.hu/uploads/file/13366487348.pdfIn PDF document text
    • http://winhazel.com/indigo/ckfinder/userfiles/files/rewusibukixivoketasasop.pdfIn PDF document text
    • http://wangyiphk.com/userfiles/nirarigovedekigo.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/xefar.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/17510250327.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/bezesi.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/jemoxugit.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/vugofojofaj.pdfIn PDF document text
    • http://xn--80aejmo0alc.xn--p1ai/ckfinder/userfiles/files/71039970576.pdfIn PDF document text
    • http://anbao.vn/uploads/userfiles/file/lulonol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=solid+state+previous+year+jee+mains+questionsPDF 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_off0000e0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F8 20552 bytes
SHA-256: 2f61305d9b0e628978b54540a73c54b6ed944a027b007bca5169c581925ab118
font_02_sfnt_off00012e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E7C 11184 bytes
SHA-256: 571bb10370809b8447c551220860c055bd0e9c4baa373c5e76cdc57ca3ce8c1c

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