Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1065d12bf792a6e…

MALICIOUS

PDF

86.1 KB Created: 2021-09-20 17:30:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c3d0426590d19597a7712ad3a47e985e SHA-1: b33616252a71d6bf76a24132eb701080a7a38a75 SHA-256: f1065d12bf792a6eabc490052184a9411f113977be32fac63be626e79d03c34e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code or redirecting users. Multiple heuristics indicate the PDF acts as a link farm, pointing to various domains, some of which are hosted on compromised WordPress sites or disposable hosting. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://indianspringhomes.net/userfiles/files/jagofikawojizemonun.pdf In PDF document text
    • http://hzyixiangchem.com/upload/files/jonukerinujitusiwe.pdfIn PDF document text
    • http://www.sintsprev-ms.org.br/ckfinder/userfiles/files/59629882518.pdfIn PDF document text
    • https://bonekarusa.com/contents/files/54141084478.pdfIn PDF document text
    • http://www.miyadenthai.com/image/upload/File/58388156893.pdfIn PDF document text
    • http://kahounova.cz/userfiles/file/38983674361.pdfIn PDF document text
    • http://spbmedaks.ru/sites/default/files/uploads/xufuporoxozibefojinogase.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/bexedenevulodubujo.pdfIn PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/34672737414.pdfIn PDF document text
    • https://carlojans.com/cms/file/46352205383.pdfIn PDF document text
    • http://iraneto.com/basefile/iranetocom/files/kurelusuwudovodazigotix.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/92503827494.pdfIn PDF document text
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/jizux.pdfIn PDF document text
    • http://www.vako.vn/app/webroot/uploads/files/rutezuja.pdfIn PDF document text
    • http://poaglasses.com/uploads/files/202109110149245540.pdfIn PDF document text
    • https://oriontradecom.com/ckfinder/userfiles/files/57016205336.pdfIn PDF document text
    • http://free-note.kr/files/fckeditor/file/473673487613d53a3ed98b.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/ea3f1e5ccf53195df148fa3b74203a2b/43392383821.pdfIn PDF document text
    • http://camonetinternational.com/files/file/gotakaxilupadusuke.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613b3da8eddb8---53102856237.pdfIn PDF document text
    • https://smartstone.ca/userfiles/files/35996731338.pdfIn PDF document text
    • http://xn--80aafmoni2biho.xn--p1ai/admin/ckfinder/userfiles/files/durujiviwo.pdfIn PDF document text
    • http://skncn.com/u/files/76706378979.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/jenuvugosokeduganonaf.pdfIn PDF document text
    • http://serextion2006.com/js/upload/files/depukimipovaxaxel.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/09c804b6d9da0268419601c191d737d6/jelutet.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/udpgqaljmdu6p10keqe6uv1uk4/gifiretojamodurananuzu.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/161477be555efa---fowogegosiroda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=el+aleph+jorge+luis+borges+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_off0000e88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A1 18196 bytes
SHA-256: b9672b7054b3c07485017928fb722f1b2b4082a69f6f57503624bc1b1d2a48c5
font_02_sfnt_off0001300a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1300A 10928 bytes
SHA-256: 4fc5b80290eecc96da4a39651219b2c5aff889317bf1f3f9a70bc71928083219

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