Malicious PDF — malware analysis report

Static analysis result for SHA-256 9090dd5ff4bb0bd7…

MALICIOUS

PDF

83.9 KB Created: 2021-09-05 08:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6abcf8abcb27cf6283cfec854524a8ee SHA-1: 8cd569a76a66e5ad062101f5357235de2cbc7fb3 SHA-256: 9090dd5ff4bb0bd7e323f0b4716682430c68751be383c83e1b567894f817d805
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. These links likely lead to phishing pages or further malware downloads. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://coretry.ru/uplcv?utm_term=pdf+reader+app+windows+10 PDF link annotation
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/bc766d9bf84a335ce3ca330ca7eb9fef/tuvimego.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/37764384657.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/xutulezoruguga.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/53797197397.pdfIn PDF document text
    • https://skillmapmagazine.com/ckfinder/userfiles/files/97457690063.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/2mdifet0k1eh4l7evn3q9a57u4/42571157190.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/72529140342.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/9a7c7d2f75cb1ab8cdcabbe0b2717ade/35846410731.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/q66aolremi3i0hgfhjfklqk461/kitafutomewup.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c883119e4f1---78767144360.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/62udqmskfr4s6hvoggadcjivm0/13190182972.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/18588836661.pdfIn PDF document text
    • http://ziva-muzika.cz/files/file/66123800003.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/94a7123a7b905d970eee9e53f2c11735/47212340727.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/18523538795.pdfIn PDF document text
    • http://www.hzkontejnery.cz/ckfinder/userfiles/files/vugoxag.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/n854ev71iorb9f2hqt0qkkpt35/17891204753.pdfIn PDF document text
    • http://ingegnasrl.com/userfiles/files/85004829799.pdfIn PDF document text
    • http://terralindahigh1981.com/clients/866868/File/parugopabibozapudepijapa.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be1345c4544---12835300325.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e9b3d56d8---7660613895.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c74718daa---14453312108.pdfIn PDF document text
    • http://snft.ro/media/file/lujobenidadaz.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/77438901236.pdfIn PDF document text
    • 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_off0000e6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E4 10608 bytes
SHA-256: 3e622d3e0f5888aefd4fd963f3f0872ce219226c83b9d9ead74cdd6dd9050d87
font_01_sfnt_off0000ff4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4D 16504 bytes
SHA-256: 2a23abd1b04408f9b013d9345c983fc6b81fcb533fd13f6e53345c28e8a2d541
font_02_sfnt_off000129c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.