Malicious PDF — malware analysis report

Static analysis result for SHA-256 f40292db49462f03…

MALICIOUS

PDF

95.6 KB Created: 2021-10-13 12:59:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: d24a2042fafea954c2a6927840e8a731 SHA-1: 5cef1b3b8a1ff2535ae97a5368583f425399f6fa SHA-256: f40292db49462f03dc45b43bf2481e46ea56bd188ec2f78447668fb046da43d0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. The PDF contains numerous embedded URLs, many of which point to suspicious domains and are structured as a link farm, a common tactic for phishing or distributing further malware. The `PDF_SEO_DISPOSABLE_LINK_FARM` heuristic indicates a high concentration of links on disposable hosting, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.pantonerestauri.com/ckfinder/userfiles/files/84890746479.pdf In PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dd08b666b8---36145730466.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/zulifemibisilotuw.pdfIn PDF document text
    • http://nghiencuuykhoa.com/uploads/userfiles/file/jalisonutorunerekijavagog.pdfIn PDF document text
    • https://ctners.com/ckfinder/userfiles/files/gilami.pdfIn PDF document text
    • https://martabaktelor.com/contents/files/namipitokexasolenifadagi.pdfIn PDF document text
    • https://viveironativodevicosa.com.br/ckfinder/userfiles/files/46642461232.pdfIn PDF document text
    • http://www.cenlafilm.com/siteuploads/editorimg/file/bonisozuwumiraravibulu.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/netiduz.pdfIn PDF document text
    • http://forma8.kz/ckfinder/userfiles/files/87614375645.pdfIn PDF document text
    • http://uniroll.pl/user_images/file/36738268313.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/81857702263.pdfIn PDF document text
    • https://wanna-drive.nl/files/File/titulibelawujakugadido.pdfIn PDF document text
    • https://funstore.dialog.org/userfiles/file/59090594768.pdfIn PDF document text
    • http://sporteambiente.it/ckfinder/userfiles/files/puxumadonimalifu.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/3b6g6enoc7kgsvoh0j3o4d76la/23911550856.pdfIn PDF document text
    • http://ketoanaca.com/uploads/image/files/fikenugabadofawixifit.pdfIn PDF document text
    • https://premiersuli.hu/files/files/dosupefagamekivukupebanov.pdfIn PDF document text
    • http://rotarybrescello.it/userfiles/files/koxolesebuzigorop.pdfIn PDF document text
    • http://mikol-styl.cz/userfiles/file/nibojimesubar.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/79915622448.pdfIn PDF document text
    • https://binhvi.com/upload/files/2305371405.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/wawezivux.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/HTGXzuRVGb4/uplcv?utm_term=genetic+variation+between+distinct+populations+of+the+same+species+is+known+asPDF 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_off000108c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C1 20140 bytes
SHA-256: 2c03917d39d07df0046c7c9acb531d4920201720f08f8bfc882ed0d98afb6a9d
font_01_sfnt_off00013d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D8E 11408 bytes
SHA-256: 497cf6c580ed094f065c2b1f9163f17c34d54119fe39b47b56f644faf66852cb
font_02_sfnt_off0001582b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1582B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1