Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f6965ae17a99236…

MALICIOUS

PDF

79.0 KB Created: 2021-09-16 14:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 408e207ef17ddc2c7d24e071541da729 SHA-1: 247a365716c1da2e75fd2ef7570ed16cd8d113d6 SHA-256: 6f6965ae17a992363999e6de2d4f02878badceafb550009c7cddfb466e95d887
156 Risk Score

Malware Insights

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

The PDF contains a large number of external URIs and is identified as a link farm, with many links pointing to compromised WordPress upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware through the linked compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ayurveda-shiatsu-nice.com/upload/files/fozorugafizaxakifujopi.pdf In PDF document text
    • https://icoachyou.biz/images/ckeditor/files/fefoviwozakatu.pdfIn PDF document text
    • http://carbonelite.ru/file/nepukasojowofufureletasu.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1613388f77fe9d---rakenidajilabafubatu.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/pabedas.pdfIn PDF document text
    • http://www.casasemio.com.br/ckfinder/userfiles/files/89956131190.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/13113804552.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16141b35a61d2a---fowurazijilenopo.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/gsgg2khovvptulu0slrti8i370/55454707737.pdfIn PDF document text
    • http://szkolaprzybranowo.pl/ckfinder/userfiles/files/fapimepa.pdfIn PDF document text
    • http://gpba.ge/admin/ckeditor/ckfinder/userfiles/files/65074560227.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/558b33d3c79d1213b9ca149f18bb08e6/58078612390.pdfIn PDF document text
    • https://bengalroys.com/ckfinder/userfiles/files/93287628001.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/161432dc201cdd---fibuwafexinujidimisodo.pdfIn PDF document text
    • http://rebeccafantarchitetto.it/userfiles/files/54366669686.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f588d7746---30895764067.pdfIn PDF document text
    • http://schokozentrale.de/idata/35462991741.pdfIn PDF document text
    • http://www.americaninvest.net/upls/files/66503493881.pdfIn PDF document text
    • http://bbhshipyard.com/userfiles/file/84055887267.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/wedol.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/kakaboneduzuso.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/8943165910.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/22125173784.pdfIn PDF document text
    • http://villa-margherita.biz/userfiles/files/36197260565.pdfIn PDF document text
    • https://kapokcmassage.com/uploads/files/202109020720301429.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=is+mi+redmi+samePDF 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_off0000d109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD109 9992 bytes
SHA-256: fed004eedefc5312c6e816d896c3ee6fbb37bb26288e91fc887175464c2aa4af
font_01_sfnt_off0000e71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71C 18192 bytes
SHA-256: 6a60ebb27f85ca09f45009a7380c00f8d726a4db96ca0ea4f1c8e1ba869f83ad
font_02_sfnt_off000116d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1