Malicious PDF — malware analysis report

Static analysis result for SHA-256 e19ba7be63ec62f6…

MALICIOUS

PDF

60.9 KB Created: 2021-09-03 05:20:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ba5ea5e7600dd4a12ea295c375fd52a3 SHA-1: 0883c2416bd26eb139da451b37b11777b7c8321b SHA-256: e19ba7be63ec62f661d310f739728c280748955c1731dfcf1dc29c323d27a7d0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the structure and URL patterns are consistent with a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6927

Heuristics 5

  • 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
  • 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://synerhu.ru/uplcv?utm_term=anemia+y+tipos+de+anemia+pdf PDF link annotation
    • https://sjamsul-hidajat.id/ck_uploads/uploads/files/46440539080.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec2fbd73b9---76794623516.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/35289257324.pdfIn PDF document text
    • https://tepihtrava.rs/files/fezekoja.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/7bb42ce33017cc798dc0a5b442301352/tujikukope.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/5bo5gt8geot309l6f1gq2ke4ug/80609782984.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/142113016827.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/si5smahg0kle4jj36d7a1mfgj6/63555656521.pdfIn PDF document text
    • https://kuzeyilac.com/resimler/files/rirumanizapizofov.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/pt3q5i442v85pq3kb5c1b6cas2/wexifakosopekipodap.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/71152444346.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/oric3p3s4bjcuaa0bb3mhivdud/38690589043.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090796c1f544---87505325663.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607cca7802096---29965448320.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/98cfbd41938e771020394de9709dbf76/16787941583.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4f088f076---lazekufuna.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/45031819327.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c901429447---89216218769.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/ed87e25500c9e0fff87c0ec7fa52a968/81740613355.pdfIn PDF document text
    • http://psychanalyste-gard.fr/ckfinder/userfiles/files/wawetek.pdfIn PDF document text
    • https://astefin.ro/ckfinder/userfiles/files/tunikatuzakoni.pdfIn PDF document text
    • https://stotex.rs/files/80205774407.pdfIn PDF document text
    • https://kozhikodedeaf.org/admin/my_files/file/xejoxidelupipifeneduji.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/853ed09a1db84f2309d67634f9094e7c/jixedagazajedusokami.pdfIn PDF document text
    • http://wilkinsconnection.com/clients/9/94/94ba1e7d864c5c8af3bb481f5f9f31de/File/18085362407.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c78f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC78F 10608 bytes
SHA-256: 7b30df076a89724f9b432393e4a9723e01ce4f6a77bcb991d0678b47001b856f