Malicious PDF — malware analysis report

Static analysis result for SHA-256 73d1197b260fdf43…

MALICIOUS

PDF

83.8 KB Created: 2021-07-24 21:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f078684fc6c74cb7b104104e76dcac30 SHA-1: ec9b15d098821f8a8c5261bd91a3deb6a0329897 SHA-256: 73d1197b260fdf43bb32c261448b4c5dd6908e5bc65a2a363ac9f03f1a8de77c
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

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 https://alshamiltrading.com/alshamilfiles/file/38003729430.pdf In PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/8df30d4891aa1c86c1a8c7fca1431490/mofodenufivodosuxid.pdfIn PDF document text
    • https://ipssecurityconsultants.com/ckfinder/userfiles/files/gotadukasekororezupaji.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/jusopajavusitikabototipe.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa1cd75c76---47116309908.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/1564257036.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/153b18ca7c10943146024bc2f4a918a2/gifidulebawizo.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9f5cc466ff24ddfe6f6aad8909f3a2b5/65911195771.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b39cfac098---fogez.pdfIn PDF document text
    • http://f-kcc.jp/user_data/userfiles/files/15439688927.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/5edc78f369e8387b57f90265fbe75c32/xumedakap.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/xadigalagare.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/3f273fb5e2b94bcf3d3a81a924cd376c/58780998347.pdfIn PDF document text
    • http://moscowfashion.net/content/xuploadimages/file/fojazunubugopakomowun.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607f898f2a6f6---kifire.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb3ee4b582---40391778753.pdfIn PDF document text
    • http://www.grifin.sk/files/6676167349.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/qgmab4m0gm76r1t82agg82tq2q/52250421077.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/lavegiwiwivesifuxozuwobep.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/3psb7992or7dvq9sk2uksb70b5/47323516683.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/suxaxupitewajoramupatij.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160da875a46064---maraxegazojujupojodi.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1a5d8c62c---nemafisodasomelono.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=what+does+a+credit+analyst+doPDF 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_off0000e50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1D 17188 bytes
SHA-256: 7d59107b7a87a734c178c74da1aacecb7a5d092b66fc9175d6d2d109508a61d2
font_02_sfnt_off000129df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129DF 10576 bytes
SHA-256: f5d3906d90cbc1cbebc626ddf186547928fc8c6d15645c8ac89ace20023d12b3

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