Malicious PDF — malware analysis report

Static analysis result for SHA-256 692da11b60d52687…

MALICIOUS

PDF

81.2 KB Created: 2021-09-14 11:54:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c70b734f6d6fe1033affd15c2d68e65c SHA-1: aecc1c566b8c6be8e897978446f18aa31f864562 SHA-256: 692da11b60d526872513414533a8e5ad3051e66b0bbb9f5675520d0580a7544a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or social engineering attack.

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://pirkitpadangas.lt/ckfinder/userfiles/files/gevoxujitukerap.pdf In PDF document text
    • https://alamansyria.com/userfiles/file/terenizubanabipoperijifis.pdfIn PDF document text
    • https://doktor-ara.com/userfiles/files/ledoponujod.pdfIn PDF document text
    • http://finance-bulldog.cz/UserFiles/File/38329405444.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/jegadexolepamafefa.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/pumolazajarifu.pdfIn PDF document text
    • http://mydreamtuscanwedding.com/editor_up/89338511956.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fbf0dc549b---jikemitazune.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/u8iuks1u46eq902pj8o19e5u33/96385383998.pdfIn PDF document text
    • http://namadagaskare.ru/ckfinder/userfiles/files/86293765677.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/33077685737.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/tifaku.pdfIn PDF document text
    • https://dbhattacharjee.com/ckfinder/userfiles/files/95828941263.pdfIn PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/82355658810.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/161358cc768672---gunilamozubadejunuvodana.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/72411176553.pdfIn PDF document text
    • http://nuk-amro.de/userfiles/file/47397152191.pdfIn PDF document text
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/vumujilapizafazopexiliw.pdfIn PDF document text
    • http://highdeal.linkeo.net/ckfinder/userfiles/files/75012309305.pdfIn PDF document text
    • http://dentistturkey.com/image/files/korekukumonukeb.pdfIn PDF document text
    • http://ckattorneys.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/83723491127.pdfIn PDF document text
    • http://gyarmatilovastorna.hu/userfiles/file/wafonapirufejineralekejo.pdfIn PDF document text
    • http://www.tlo.ntou.edu.tw/ckfinder/userfiles/files/besegusorafilozitopuz.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/kejet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=justice+league+2021+download+onlinePDF 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_off0000d68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD68B 18460 bytes
SHA-256: 7c6e225fddaf8775754c27c7aab56aed1a1d72adeaf8828ebefb883ad9edbead
font_01_sfnt_off00010577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10577 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8E 10916 bytes
SHA-256: 6da5b6010591743a6d109655d2345bcff38154ee946104df8d27ecf737866378