Malicious PDF — malware analysis report

Static analysis result for SHA-256 e58efcfb9bad71c7…

MALICIOUS

PDF

78.3 KB Created: 2021-09-05 01:55:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 12f1fae075c0f50736d5eb16b4b71462 SHA-1: bd83ee5b2260f6f933509ddf186f65d9356a924f SHA-256: e58efcfb9bad71c770d4cde91aa4b9b31b1fdc6301dcc2887b0076236796757d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable domains. These links are likely intended to lure users into downloading further malware or submitting sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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://medvor.ru/uplcv?utm_term=parrilla+electrica+taurus+manual PDF link annotation
    • http://i-daa-wl.de/userfiles/38465515847.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbb2d4585c2---wufisewapopebuvaxof.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/5h364q7es3tpp5375s5o6rc4d6/1705994951.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/81735753251.pdfIn PDF document text
    • https://greenfins-thailand.org/uploads/file/moleganodoxefesirududofi.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be62034d7c---fevetodibaketa.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/57000059667.pdfIn PDF document text
    • https://maryamghiasi.com/images/upload/files/govalobegamipobosazuz.pdfIn PDF document text
    • https://ssvacancy.com/ckfinder/userfiles/files/jetivonozuv.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6d1f5ea5a---sizavefakusi.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/2023713001.pdfIn PDF document text
    • https://goldenapp.net/file/jubijamogopuwimezi.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/11777477581.pdfIn PDF document text
    • https://songod.vn/uploads/image/files/90222768742.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/ickk7mt6evr30418mb8h924jv2/11803116525.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afbaf5cfd28---dubapojamawuwotowolo.pdfIn PDF document text
    • http://voijin.com/userfiles/files/fakub.pdfIn PDF document text
    • http://revucue.com/ckfinder/userfiles/files/tapik.pdfIn PDF document text
    • http://smolninskayahotel.com/userfiles/file/zumuvugonava.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/919kf1ul2h9l4100ei51bvia87/puzoze.pdfIn PDF document text
    • http://cnmrobotics.com/files/files/14545241689.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ce34ce25e---27212542046.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/42595600352.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160e45b1913ae3---55927087296.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_off0000ce42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE42 10372 bytes
SHA-256: 43562366244806ba8e0013b448f18614a04e1cd54c98af55baffc5c36d89cbfd
font_01_sfnt_off0000e5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A4 17664 bytes
SHA-256: 6516345fcbe6e2b96c19cf752db8f065f0e00dcc016f95c9e782b72b7a3e76a7
font_02_sfnt_off00011347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11347 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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