Malicious PDF — malware analysis report

Static analysis result for SHA-256 098fa7907bd27c01…

MALICIOUS

PDF

94.6 KB Created: 2021-06-30 21:51:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5cba06d4ec498d2f2f50b550e8794b5a SHA-1: b1d16dd1b5b3b15e109306fc819cb7d7cff3d78b SHA-256: 098fa7907bd27c0122e35b84e24ca073b53617ea186a64ddba50180badab75ed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://sshs1962.info/clients/3/33/33dcd814b32da85629335a95ab3d0158/File/pamej.pdf In PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d65f5d37a1a---jewupesi.pdfIn PDF document text
    • http://hrudolf.com/userfiles/36344178594.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a6571aed4e1---46068411750.pdfIn PDF document text
    • http://abc-tel.ru/data/File/68046988285.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/fda435e6c6a24868ae01537d4d269b54/jamojabisof.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/b35084a46568713d9e2fbc1021a604df/62492524119.pdfIn PDF document text
    • http://katachizu.com/img/news/files/58414423945.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/3r03hj0aqamecbiuf1f3ggmbv7/34684175604.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/hd6bqqv7kk091d9g7u2t8pef61/vofavoxig.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ecafb47422---40588897537.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084bb96e9ca4---sitopobosidodumujemenipe.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/agq42m3hrblfpssrpbl96cq1i4/pozexuladegebasa.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097a53907514---kopesamem.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868b5d3fde6---nikelejazodudut.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/takasanixapumevilumubixe.pdfIn PDF document text
    • http://szalkasszorutacskok.hu/app/webroot/files/content/files/foverawejoxaxiximu.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/5dd4339d2adb5f6571a763868017e24f/65666550986.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a9cbdbb68---59088251274.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/etf9b8jc8ufb3j1rkf6roqm9g7/89860638901.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16093bd4ed9ddc---dagat.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/ecc6d53dc82b2422f7ef60219e0c04c8/44022461418.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/dujazapopazuwivo.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f832c472a8---56493644487.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/vodufizubigigamowopo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=largest+beer+companiesPDF 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_off0001101e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1101E 10768 bytes
SHA-256: cae1c559c8b2f97a2d377c5d64a51740d25919a5ece0d9b929fb9cbef3d07e1a
font_01_sfnt_off000128ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128AC 17028 bytes
SHA-256: 520ca5015735743c4b82bcb8b77b3973a2f89224c50e1c4c2da4697203130232
font_02_sfnt_off00015538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15538 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1