Malicious PDF — malware analysis report

Static analysis result for SHA-256 041a232cf336cc12…

MALICIOUS

PDF

70.0 KB Created: 2021-10-03 18:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 95b1b42a77d3d58a8a16f54688cde666 SHA-1: 558f0ecfe3617c47e966825554c71f7361d2ee9c SHA-256: 041a232cf336cc1223923927fe75d50a95de282fe9355cb4dcfd4bd96987995b
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to potentially compromised websites, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links point towards an attempt to redirect users to external, untrusted resources.

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://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16150279a4bed0---fenefesadujirezunan.pdf In PDF document text
    • http://munnarinfo.in/userfiles/file/32646416535.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/3453288558.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/20219241622422605.pdfIn PDF document text
    • https://ipekyolumedya.com/resim_galeri/file/35710225160.pdfIn PDF document text
    • http://torremaggiore.sitmap.it/files/files/kozopexixupemiturofupexi.pdfIn PDF document text
    • http://tacchigroup.com/public/thread/risorse/file/pokesunovejaxetimidoj.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147d59de2951---zotefosanefuji.pdfIn PDF document text
    • http://szmchem.com/userfiles/file/28885224607.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/91606679405.pdfIn PDF document text
    • http://msiutilities.biz/documents/2765135141.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/60281792506.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/27675600677.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c60ca0026b---vepitoguni.pdfIn PDF document text
    • http://35ct1.com/images/ckImageFiles/files/72310271141.pdfIn PDF document text
    • https://andhimazhai.com/images/files/juketogeg.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161568bad5c9e9---poxoxozodasirebexenosiz.pdfIn PDF document text
    • http://basumati.com/app/webroot/ckfinder/userfiles/files/62812091216.pdfIn PDF document text
    • https://soudurelausiere.com/upload/editor/file/befomilapamelenabadix.pdfIn PDF document text
    • http://awfiowv.love-mrt.com/upload/files/74557803481.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/vajevuxip.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/20964602945.pdfIn PDF document text
    • http://stellarp.com/userfiles/file/zalekozizenuwuxede.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=internal+combustion+engine+components+pdfPDF 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_off0000b0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E2 11156 bytes
SHA-256: 2cd92941c7e4a2232af0511027ed14c7604507038db1d342629c087012f272a0
font_01_sfnt_off0000ca85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE297 15820 bytes
SHA-256: c1d016eb4dea4caab954e8100d939515ba27a5c080ad3c843d37974eb291ca9a