Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e031707c7fde77…

MALICIOUS

PDF

91.2 KB Created: 2021-06-26 12:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4780b9e6d2a412a094c3634e853ef35b SHA-1: 30fa6be25befccc141f5d419cdb05e3399bdcd95 SHA-256: e0e031707c7fde773ed345d3105971c2447df2cc1223906a7eebe1a79b1225c1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm hosted on multiple compromised WordPress sites, identified by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. These links likely serve as a lure to redirect users to malicious content or phishing sites. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 5

  • 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://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/rmop7jn08i3pueveo5rfchklm0/vekuwakebiviveku.pdf In PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/59a21a911a7f0741b2e29bc7476d2295/jekimogonefeju.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/24121918931.pdfIn PDF document text
    • https://concertwristband.com/resimler/files/likowarugoruvek.pdfIn PDF document text
    • http://pleasanthillpchurch.com/clients/5/55/55aa087cacc886b2254ddcc242c0699b/File/71125503335.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/f9d2cea959209da7941997de8bda6413/robulebefabare.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/62b120fba898cf3b5b2781e8bd9e89c8/lezonedo.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/d1324925e277c2faab038a296b5f7023/mobevup.pdfIn PDF document text
    • http://yjsyrj.com/userfiles/file/wojekoluzoba.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/5d42bvpc357ssapnlvod8k7mn4/50719412726.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd01478f5cf---84052586830.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/181f8ecd484bbbfac738f7b78b57438a/36460044266.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/xepebotimex.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4ef1e7113---xavosofudipuxe.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/bupigi.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/bapalikesosulusiwidibe.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/b4e1ac6ea63bcecb0eead753343c0b56/xorexagalexow.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f46ae0c6e---vetanebilirovovedafuvev.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/irjljjgfpksq7vsvn82m1tekeq/41752123072.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/090d803b9b4988ba807cbbe5ca49f0a5/dotebefa.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/54472733278bf41149ed168736e260bf/topusunokejevor.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/tegazadunuzotuk.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/97d907821b2714e6f1d64f92879a1cc7/90929920348.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/82af85521e4303e133270ea661ef5a0c/pasowojubeforonipif.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/texotefunufagosexep.pdfIn PDF document text
    • http://thetuckerfamilyreunion.com/clients/67950/File/80311461089.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=the+right+humidity+in+a+housePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF3 10824 bytes
SHA-256: 1bc38c3095614a7400121c8123720a13224c83e8cde284b821e175583df9fe07
font_02_sfnt_off00013395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13395 16996 bytes
SHA-256: 05d9b7fa76cacf30aaf88abd9912d4a75f962d9b7c958988b315517f8d4a1b8a

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