Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee9e818af64e6500…

MALICIOUS

PDF

70.5 KB Created: 2021-10-03 18:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 06b1e5d3f347639e57c4eb3b3385e8d9 SHA-1: 5d93ee3347dcc8330eadd3bb04bfe1d7a864da98 SHA-256: ee9e818af64e6500d9d17a55adecc0854be570bd5e166ab8dde1415de76e7dfa
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm on 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 embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://archism.ru/uplcv?utm_term=find+one+value+of+x+that+is+a+solution+to+the+equation PDF link annotation
    • http://ffarchitettura.it/userfiles/files/75664809929.pdfIn PDF document text
    • https://camphacement.vn/upload/files/ximik.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/upljt85c29332560h0l779572q/nitubojodanu.pdfIn PDF document text
    • https://www.rougeindigo.com/ckfinder/userfiles/files/sumutivizunironozetig.pdfIn PDF document text
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gawawut.pdfIn PDF document text
    • http://ricettebiagi.it/uploads/assets/file/86835853502.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/9fec8f16d7ddcc7ce456d6b0e85a8619/94682027631.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/lipujumoxobifibup.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/zetafar.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/xabinelubi.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/52828872690.pdfIn PDF document text
    • https://anbuadidravidarmatrimony.com/ckfinder/userfiles/files/33323384786.pdfIn PDF document text
    • https://maviet.vn/upload/files/94731465966.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16150b5504669a---fikewozidefulam.pdfIn PDF document text
    • https://prettygreekvillas.com/admin/fckeditor/editor/filemanager/connectofile/83121213320.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/78362307953.pdfIn PDF document text
    • https://istanajpdua.com/contents/files/13790461740.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/57696232869.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/64822447321.pdfIn PDF document text
    • http://rkenterprisesonline.com/FCKeditor/file/69181556288.pdfIn PDF document text
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/sasatot.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/tofekepubevisob.pdfIn PDF document text
    • https://tumujerrusa.com/userfiles/lodulezabesi.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/lcqhs61anqmvv7odeeat3dnvdg/35953532967.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_off0000b2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2E1 15976 bytes
SHA-256: 3f85336f457c90ff2502c96efda5199d4819bbd12ad2e5406dcb4fe8f3db4c36
font_01_sfnt_off0000db4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF366 10744 bytes
SHA-256: ea0751ad400b6183ec849e8f7b49556682b4b3fbedc7fd495c5e736f34c6e467