Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0920ecccb1cea7…

MALICIOUS

PDF

86.0 KB Created: 2021-09-12 02:21:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b1cc8cf06cf7d65b58920aa01bf373fa SHA-1: 6b198451ee3850a72087ebc6c291ff405d10e4a6 SHA-256: 2e0920ecccb1cea7a47748028aaaf16f0e274a4e79908c27330587fa1c83ff2f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to potentially compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links. The embedded JavaScript may be used to further obfuscate the malicious links or initiate a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://jacsonsfurniture.com/userfiles/file/85466623147.pdf In PDF document text
    • https://metnar.pl/web/uploads/files/ridalifarerizasu.pdfIn PDF document text
    • http://asqcert.net/files/files/sorizepaf.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/161307a798197e---xirekojoxibugefovujuxexel.pdfIn PDF document text
    • http://www.fashiongale.ro/userfiles/files/xexomezoke.pdfIn PDF document text
    • http://jobsandhi.com/uploaded_files/userfiles/files/53469933815.pdfIn PDF document text
    • http://naturenhuman.com/app/webroot/userfiles/file/70454733006.pdfIn PDF document text
    • https://pharma-tools.pl/galeria/file/14641554465.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613866ab1b796---nabukevagixurudatovojorik.pdfIn PDF document text
    • http://yousefmaktabi.com/ckfinder/userfiles/files/23215858197.pdfIn PDF document text
    • http://pho32shabu.com/uploads/files/kubukoj.pdfIn PDF document text
    • https://martabaktelor.com/contents/files/wimukebif.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/76621983301.pdfIn PDF document text
    • https://petala.gr/userfiles/file/54377335921.pdfIn PDF document text
    • http://kcde.kr/userfiles/file/lekelelexifixebo.pdfIn PDF document text
    • http://smalternatywa.pl/media/upload/files/89713fb12607891c9b5a8773434ba98e.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/e30bb7c9dd03c12237fd6b61fe3f4639/2788883370.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161311dc046725---13000596668.pdfIn PDF document text
    • http://chamdure.com/DATA/files/9072632866.pdfIn PDF document text
    • http://textstricker.de/benutzerdateien/1166769370.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/sijatavivexevulita.pdfIn PDF document text
    • https://xn--bankkrtya-41a.hu/js/ckfinder/userfiles/files/52551995455.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137a34ccb331---33139427787.pdfIn PDF document text
    • http://westhollywood.ilovepokebar.com/uploads/files/36262235678.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d02cbdbe12---857639558.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=how+to+make+your+phone+flash+when+you+get+a+text+androidPDF 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_off0000e8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D7 17832 bytes
SHA-256: f64bc05220d33b1af22f484b91a29221fdffe803a1bab364ec2993bcb9e0a0ef
font_02_sfnt_off00012f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F5E 11428 bytes
SHA-256: 3d0dd7c41b2a9aa213b1d2d12bb403ad6c0dca29e7e41daf98694d294f2d1467