Malicious PDF — malware analysis report

Static analysis result for SHA-256 5060107369ab038b…

MALICIOUS

PDF

90.3 KB Created: 2021-08-01 08:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e9fbc2b302462975a039ba3b15aba082 SHA-1: 7b7f6e1403c1367273bfda917bf4261d601f557f SHA-256: 5060107369ab038bfbf2532bc6393cf07bd2887417fa59f6ef501d24e47b03f5
96 Risk Score

Malware Insights

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

This PDF file was flagged by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to manipulate search engine results or phish users. The presence of multiple distinct hosts hosting similar PDF files indicates a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/b65b21eb5e888435ff171b07719c08ff/90949205702.pdf In PDF document text
    • http://bannails.com/fckeditor_userfiles/file/tagozefopebazut.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c98db5e38fd---68695052028.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/161044af86732d---fibaxokoribedijonagizut.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160d7b021ecd84---88290610295.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081a9369c40f---82032372020.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/ofuqvoq1bo0l4urv8503q49ce3/nepoluduxuv.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/b63dc20149a07ca70e91622c063b233d/poguzogufawinoramob.pdfIn PDF document text
    • http://galgalesh.com/userfiles/file/rujamusomolinuni.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad2e2eaa42---waguwowoxixaxugasugaba.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/19726727389.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/babenenudomid.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/o5gnlhb6c2biggi8sf5oj33vo7/80537993062.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/273f338b5bbcdde11b43b9dfc68a9991/14354561764.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/dkv023672jbre4b4ncb7imlk60/wusamukudogixopetekip.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609da40521e12---49849715627.pdfIn PDF document text
    • https://www.lucaslobker.com/minor/ckfinder/userfiles/files/filawutavinararisison.pdfIn PDF document text
    • http://evola.it/userfiles/files/vexeripivatesavutezamel.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/burinajasuwotiti.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1f3a3fb25---kojurinibelumixoniwo.pdfIn PDF document text
    • http://oilandgaswork.com/userfiles/file/juwabunivutafudejiro.pdfIn PDF document text
    • https://terryhaas.com/wp-content/plugins/super-forms/uploads/php/files/c942c2081510a70cd8e48da56c2e1342/74477951989.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/nugozaxatewo.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c72884eb017---bowagiletiwanemikufil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=night+literary+terms+worksheet+answersPDF 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_off0000fb3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11351 17656 bytes
SHA-256: 7d4275af4ccf217166a5f7c3ff9b0231c5ec35582e2ecd9155ae3b69e357280c
font_02_sfnt_off000141c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141C3 10824 bytes
SHA-256: 4eb6f6e457eefee3eb1263f44c1d936e469d6c5ac604f5f85d030ccecbc3a94a

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