Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bccd590b6d935a4…

MALICIOUS

PDF

73.3 KB Created: 2021-09-09 02:51:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 64e5ce4335c8f34d5c6038466d1b8ce7 SHA-1: bba7a320ab881210d4ee35267e781c24b1d58c55 SHA-256: 2bccd590b6d935a44c6fea6352812b0be04f5fb7c1b36f2787eaa20b7ddcc6e2
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting sites, suggesting a phishing or malware distribution scheme. The presence of multiple external URIs and link farms indicates an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612f01a279e80---vazifefaxutomajut.pdf In PDF document text
    • http://4bx.pl/public/file/bawakojave.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/ziragoxizabupepugoxa.pdfIn PDF document text
    • http://cgpharma.in/cote_dor_import/admin/ckfinder/userfiles/files/33857753520.pdfIn PDF document text
    • http://kpghomerepairs.com/uploads/image/files/63740800329.pdfIn PDF document text
    • http://swhwsolution.it/ckeditor-ckfinder-integration/uploads/files/9424440004.pdfIn PDF document text
    • http://dytac.hk/userfiles/72459086091.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613506cb9bc04---82780352935.pdfIn PDF document text
    • https://lifesmart.lifesmart.ro/ckfinder/userfiles/files/13115829048.pdfIn PDF document text
    • http://www.julietlandau.com/fckeditor/userfiles/file/94638343265.pdfIn PDF document text
    • https://myclubowners.travelenvogue.com/userfiles/files/75928941266.pdfIn PDF document text
    • https://edusfera.pl/upload/file/nuvumodadujikasix.pdfIn PDF document text
    • https://alixdemassy.fr/userfiles/file/12584003927.pdfIn PDF document text
    • http://mateuszkucharski.pl/admin/file/14518802025.pdfIn PDF document text
    • http://446888.top/userfiles/file/pixata.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/dozewifalokan.pdfIn PDF document text
    • http://cudicio.it/images/file/31346143227.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161313b4a9b4b8---savenududidurimufamorak.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135be8f1dd94---54916831989.pdfIn PDF document text
    • https://ls-machinery.com/uploadpic/files/202109082205235262.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/92904886401.pdfIn PDF document text
    • https://rinducm1.com/contents/files/jaluv.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/77908991959.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=present+perfect+tense+time+expressions+exercisesPDF 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_off0000ba11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD223 17560 bytes
SHA-256: 74dbd6af8a37844a0791ef601f3fd188f537737dd94754b6be38c50e778857f1
font_02_sfnt_off0000fed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED9 10536 bytes
SHA-256: 2d4a2d281dafc068a79d75cf307d627e6eec692490c421c5f01bb0436a816f63

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