Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec6ca58914680203…

MALICIOUS

PDF

89.0 KB Created: 2021-09-02 08:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 67dfad0e40a269bbe24d5c9f72e8abe3 SHA-1: bf5bd0687773d7049dbb1e01462bfca537451e23 SHA-256: ec6ca589146802030dc00c4ee10dc19d4f56a2f0b3a9670199d9db561f84874c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting it functions as a link farm or redirection mechanism. The presence of PDF-specific heuristics related to URI and link farms further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://philabc.ru/uplcv?utm_term=tom+tugendhat+mp PDF link annotation
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/45371d455b4a068d14f7c56ba7243c6f/xalapugawopusezuduru.pdfIn PDF document text
    • http://rotarylaspalmas.orgdocumentos/file/87489592029.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba03e389420---xaromupojavipo.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1611f357bcbeb0---29939782465.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/nuniweduxijisal.pdfIn PDF document text
    • https://cristalensi.com/public/File/vakeriwapemexaxozudovej.pdfIn PDF document text
    • https://aedwea.com/upload/foto/topoletivodidapaguk.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/tonawezutofowewa.pdfIn PDF document text
    • https://fetogram.ir/images/upload/files/gezexonulex.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/66075140748.pdfIn PDF document text
    • http://gabident.pl/local/userfiles/file/vufevekerifotojuxowewef.pdfIn PDF document text
    • https://www.abrasco.org.br/ckfinder/userfiles/files/nikiwo.pdfIn PDF document text
    • https://kompaspt2.com/contents//files/zebiru.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/a8ae8e5392b9cfeae2ba9ed47d971f85/88308815199.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/63286359670.pdfIn PDF document text
    • http://www.dr.schure.net/ckfinder/userfiles/files/17528450016.pdfIn PDF document text
    • http://maynenkhiinverter.com/media/ftp/file/vufef.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/66398674211.pdfIn PDF document text
    • https://giustofiori.it/file/vesil.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/14e18222ba53fb2efd6f53910336c7d8/gafuve.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf9fa370cb4---pozaxolasami.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160747493a369e---vadokovubefadawoxano.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/92501794045.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/801e593cc62fa954e4c63e2ced3d8813/82265383164.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/fepugosabiwa.pdfIn PDF document text
    • 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_off0000f7de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DE 10496 bytes
SHA-256: 255f86d4128ac4be8fefd2d4bdb316d23359c6ba00bf370f425f6713bdf1adda
font_01_sfnt_off00010f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F53 17908 bytes
SHA-256: 1c6be260374446957f87825a0037d96b9a4caedc86ee5844fbad2a2f96085435
font_02_sfnt_off00013dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.