Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2f481752254826…

MALICIOUS

PDF

77.5 KB Created: 2021-06-26 19:51:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2473e39d6d778f0a174fc2fff82f591d SHA-1: 44bc3eb61bfede53081b7508afc2196ab6856ba8 SHA-256: cc2f48175225482608b788beac98a195716a7cf001981b887494adc37b8fbb54
104 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains numerous embedded URLs. Several of these URLs point to compromised CMS upload directories or are part of link farms hosted on disposable domains, indicating a likely attempt to distribute malicious content or phish users. The presence of urgency language further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://esebtekstil.com/resimler/files/wekiredalalusol.pdf In PDF document text
    • https://led7.ru/file/88855991338.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/24261967662.pdfIn PDF document text
    • http://pune-india.info/userfiles/file/55629177853.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160724492536d3---95980795554.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608863c89cbef---xanoxumojid.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/f2a148b280e9d4049e6a10e1dc815f95/rapagimujosun.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/2sgn6qqa66t1asq8g6cffj7mth/punowasagaxeli.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a72d8618996---pogax.pdfIn PDF document text
    • https://metricgroup.it/uploads/file/wozoxetidedivamututemupom.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a029dfd0df2---69667567602.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/6388719ef00fd3f66a4f6f6255414bb3/dubexininox.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad92b46650b---15740602296.pdfIn PDF document text
    • https://drvishweshwari.in/userfiles/file/degitexetutuzabijipi.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/36447143489.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3f90c4c01---53256254880.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/80d3c12e5f48f5cec0ea9e9e56f0ef9d/39948293358.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfccd06967---85908501591.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c786e48df5---tuxigej.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/7396f1b952e86033d860e074afc520b7/jazarumepozup.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/b6b6efa0076267890616939423974ba2/88610588552.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/kogaj.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/potijemarib.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/pakidenotobagufi.pdfIn PDF document text
    • http://caryhigh1987.com/clients/41333/File/mezonet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=dil+to+pagal+hai+full+mp3+song+downloadPDF 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_off0000c98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC98D 17700 bytes
SHA-256: 2d781f0901c2cdb7447d904f478cc9a1b143d213badeaee0b0e2d0f50e72507d
font_01_sfnt_off0000f82e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11045 11072 bytes
SHA-256: 8e77f4811c9ddddcc4d1b8f889f3d914cf090fdcbea30e06a9c4507597763381