Malicious PDF — malware analysis report

Static analysis result for SHA-256 d950e9986d6ef782…

MALICIOUS

PDF

102.8 KB Created: 2021-06-26 00:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 11d09d1b9e7f2e2308f8b08fefbc6d09 SHA-1: 4f43cc4e280e1468835ab2a4130c8083f1fe3b88 SHA-256: d950e9986d6ef7826b535d41668cc4b782ff33e8fbd0f33b81bc2332eb77682c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. Although no scripts were explicitly extracted, the nature of the links and the detection suggest potential for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/197bbd093307b482dc2e2fcc07f6dffa/89907139457.pdf
    • http://www.siscbolivia.com/admin/uploaded/fck/file/sazogupuruwixukuki.pdf
    • http://mamnonlittlesun.com/upload/files/lavidutasisinavuwazuroz.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/e2a0539181f6cd0fee95e3aa3a9f6ee6/donoro.pdf
    • https://mosallaesf.ir/uploads/ck/files/kidarupirifamiludij.pdf
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/d580b8b9f5408b6c48833b753bb6539b/19468397361.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/qg8qdluc879n9g24kur3h2sthu/81253805411.pdf
    • http://xn--dlek-5qa.com/admin/UserFiles/file/rukoginixajomawebokorofo.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806e63c2c6c---24713607473.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/focb7mmv3famnj9k8dmvqaatt0/laxebogopotador.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/0683048a0930b5020b3d1990ce9da77d/44788841546.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2d41aa0aa---89901884461.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608570b63851b---zujesusenoxezalaz.pdf
    • http://www.findvoters.com/userfiles/file/19226578429.pdf
    • http://reclameindex.nl/images/uploads/wasapasowolidatowuladozed.pdf
    • http://beiwendq.com//data/attachment/file/10427194223.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/d6168d88a932a66ba87f08e6876831b2/momerumorogaxape.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/9h84irpqf5eik9871gpc0jkgr2/defujanozadote.pdf
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/rowenesurevexetemokipaxi.pdf
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/79a048735476ca426a232b9581c7c696/fugalefigusiw.pdf
    • https://securitegenerale.tn/userfiles/file/58580083194.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a44b37f4e---32728907632.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=relationship+between+hrp+and+strategic+planning
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012faa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FAA 16792 bytes
font_01_sfnt_off000147bc.bin
a1570721bece2847c8c3a1ca1d0d461481e59568dd7ea2b456231a21f119603b
pdf-font-stream PDF embedded font (sfnt) at offset 0x147BC 17096 bytes
font_02_sfnt_off000174a0.bin
446b5845b392f3382c2914c7436d27fd3b9b9752a1c4754e2da5dc1aca8f0eef
pdf-font-stream PDF embedded font (sfnt) at offset 0x174A0 11064 bytes