Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee348375ad5bb8f9…

MALICIOUS

PDF

80.5 KB Created: 2021-09-04 19:57:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 017b06522853bac7d2101c50ef679a9c SHA-1: fc9c86562332e3d38368e0f3a84d26707a68b3f7 SHA-256: ee348375ad5bb8f9bec65cde5b0b3d00b0c2fd5afe010b63bb749c718cc53ecb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classification and ClamAV, flagging it as a phishing trojan. It contains numerous URLs, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lure users to external, potentially malicious, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://chcial.ru/uplcv?utm_term=ureteral+stent+symptoms+questionnaire+pdf PDF link annotation
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854787164ad---94836836139.pdfIn PDF document text
    • http://zavalinka.by/var/upload/file/nipevajimaxujetumub.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/d75ca7cd1637596043d60f30c3d86716/97909853085.pdfIn PDF document text
    • https://mraos.com/web/userfiles/file/66353651341.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161174ad7d0c26---34328632457.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9dc7cb3c5---21923708212.pdfIn PDF document text
    • http://chip-chup.hu/upload/file/jigebolajogakadukuli.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/nuxizukesafi.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f36f55d7f0---fekinimototigemovikeja.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/6da5c3333209b33a914fb88e5491ace4/bivelawexexomewesu.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/bc8a20089bf2539a32e1b09846d798e0/gelaperotuzajitavate.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a926eaab2d9---wovolig.pdfIn PDF document text
    • http://fine-trading-knotwork.com/uploads/media/60679481131.pdfIn PDF document text
    • http://daycamhoa.net/upload/UploadFiles/files/90042758639.pdfIn PDF document text
    • http://sdds.be/userfiles/file/lominuwiki.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/395256102c1f6dc839d49561a764ab81/mudagiza.pdfIn PDF document text
    • http://schooldistrictservices.com/clients/f/f6/f6ab1571d2cdf5e569af7b76e288b17c/File/39246378336.pdfIn PDF document text
    • https://www.renfrewareahealthvillage.ca/ckfinder/userfiles/files/kubatuzi.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160b17adfe7e52---62199838589.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/12499178388.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/33302773097.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/61d0352f4f0f3b84a11949a6750c8593/52894179158.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd0ba6373a---fakagugepok.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/78360061369.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_off0000d28f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD28F 18392 bytes
SHA-256: 3a5b0f7a28f653125c4d85e6a656db8aa475e2cb54873fe18fc75ff6f74e8aa6
font_01_sfnt_off00010287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10287 11024 bytes
SHA-256: 94f7a84bba03b2eb2331e6498451d70f5716a28c0425e03662770cdd9f74952d
font_02_sfnt_off00011bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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