Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf2ad467b0e7e66…

MALICIOUS

PDF

102.1 KB Created: 2021-09-08 03:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e26ad39545a0db00dcf64bb165db3af1 SHA-1: ebf270ebafac8e7ec6f67bbd89a3752c386cb12a SHA-256: baf2ad467b0e7e66cbe364544f6a15461012deac58c071656fce7ee8fa4f7e6b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to potentially compromised websites, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/2820614149.pdf In PDF document text
    • https://filetorme.com/upload/files/gakesasevikopo.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/3f903440e9c878e2c7332ddc7357f3c7/kemabuvalokobu.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/furufevexanilurebepuvofi.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfe5f7a04c0---zojozutabas.pdfIn PDF document text
    • http://ipceurope.com/assets/file/jexuzadil.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1608f02149a1b1---lamitenalejupasone.pdfIn PDF document text
    • http://toeicspeaking.net/_UploadFile/Images/file/mazosepobolefu.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1c0756f2b---gurigubetopoviwuteke.pdfIn PDF document text
    • http://wib24-admin.de/uploads/file/70081951106.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/49292521502.pdfIn PDF document text
    • http://ministerium.pt/files/38177339155.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/sokijafabefatepof.pdfIn PDF document text
    • https://www.avantagesapp.com/uploads/files/86995146355.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/gonasabusazuwafadubu.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/5d9e1d9869611ace227f68fc8b3b0aea/pemebopigizoxafapuwepam.pdfIn PDF document text
    • https://jotekonybakterium.hu/userfiles/files/69312589563.pdfIn PDF document text
    • https://e-ceramika.pl/userfiles/file/repotomuxejasafunobilesel.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/30058277380.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/95180242529.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/p599qbtlnohbff3l04d71effhi/41999121579.pdfIn PDF document text
    • http://nexxosrealty.com/userfiles/files/zusawesel.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/tuxaxifajupanalutimirave.pdfIn PDF document text
    • http://mnwebdesign.dk/userfiles/file/5737329429.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/84aklh3hfr7vibae72u8edgtt3/gogibolubel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=geometric+sequence+worksheet+gcsePDF 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_off0001268c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1268C 19572 bytes
SHA-256: 547396bc048163fec04ab5c8357619bd8712843f2e0bd74778fb45435374837f
font_01_sfnt_off00015989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15989 10932 bytes
SHA-256: 0da4f9c72cf90f0f533af4e7747869ea4f64c3df45c849c68399f645bc34b964
font_02_sfnt_off0001727f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1727F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1