Malicious PDF — malware analysis report

Static analysis result for SHA-256 e00eac5bbe7af1d5…

MALICIOUS

PDF

83.5 KB Created: 2021-09-06 01:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 56bf5b0e1a5b6e80acf734d462a1bf0a SHA-1: 300c4115b113b47e7cb0fcff470a33a2da4ff027 SHA-256: e00eac5bbe7af1d536e79f8edd73d5faff8956c3043090bcdbd9e6f5ba5b59e6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, presenting numerous URLs that point to various websites, including those hosted on compromised CMS platforms. This suggests the document is likely used for phishing or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pusancard.com/userData/board/file/xiputebejofi.pdf In PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/161123c6881b3e---burujimigenalilawunas.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072949301de0---xododute.pdfIn PDF document text
    • http://sh-ruiyangcpa.com/userfiles/file/2021-6///20216262312243562.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/pepavigelomiwiwutaralewal.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1610e19d78474f---40804347550.pdfIn PDF document text
    • http://quaretti.it/userfiles/files/20625477091.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/4uam1edt8qlt7cfd3ggtapohq8/70284687249.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/225a52799cd0f353490e9e480c2bf987/28856830175.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/33da0c1df1f5339809430b3178b2ad03/30085550210.pdfIn PDF document text
    • http://escqatar.com/uploads/userfiles/file/file/xesuwux.pdfIn PDF document text
    • http://lovesushiscv.com/uploads/files/sarotadunisimewobepu.pdfIn PDF document text
    • http://smartvoicecom.com/userfiles/22003755458.pdfIn PDF document text
    • http://intergeored.com/upload/File/46081676828.pdfIn PDF document text
    • http://sochi-riba.ru/ckfinder/userfiles/files/mejisiferowane.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c850c3049fe---tazapupomuwikax.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/3d51d111982bf76f06938a5a90371661/53345438931.pdfIn PDF document text
    • http://ulv-fogger.ru/d/files/zowopadasilobitosoduzogeb.pdfIn PDF document text
    • http://gzhangqin.com/uploadfile/files/31404144706.pdfIn PDF document text
    • https://groupunsur1.com/contents//files/goxowuzezamokilije.pdfIn PDF document text
    • http://aci-immobilier-douai.fr/userfiles/files/5337572547.pdfIn PDF document text
    • https://conrays.ru/f/data/vakoninevebapotemuw.pdfIn PDF document text
    • http://laros.cz/UserFiles/file/82315144240.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=word+excel+to+pdf+converter+free+download+full+version+filehippoPDF 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_off0000df27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF739 17960 bytes
SHA-256: 9647612b3073dec8e2c035e0fa1877f49c1b8d2bf8d63e95796be8ae3fbfa6fb
font_02_sfnt_off0001259a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1259A 11064 bytes
SHA-256: 25e5ec7d5ac2ec317e2c6f2121632bce0cae9b76cdfbf54971fc3ffa2a205b9a

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