Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cdefd5d53e023c6…

MALICIOUS

PDF

81.5 KB Created: 2021-09-17 04:10:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 11ee056b26e6d043aeb0eceba65b20ad SHA-1: ae6a6b5f8f4c4f0b9954c5ac1b25cfbd8052a23c SHA-256: 3cdefd5d53e023c6c64e008fab001558e9879be860c3581e71a3acbda03e1dfb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of embedded URLs pointing to various domains, suggesting a link farm or phishing campaign. The PDF structure and the presence of external URIs strongly suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://queure.ru/uplcv?utm_term=unturned+planter+id PDF link annotation
    • http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/76821736167.pdfIn PDF document text
    • https://pindimana.in/uploads/file/xajinifidagi.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/24714234080.pdfIn PDF document text
    • http://dienmaythanglong.org/uploads/files/24965260226.pdfIn PDF document text
    • https://xn--fiqa735be48e.com/upload/files/72490504702.pdfIn PDF document text
    • http://www.gieskestukadoors.nl/ckfinder/files/files/13115057619.pdfIn PDF document text
    • http://slsnn.ru/content/file/bujonifit.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/rimipuzekilugevelamad.pdfIn PDF document text
    • http://cosmoscm.com/contents/files/10500840137.pdfIn PDF document text
    • http://eikenhorstgroep.nl/userfiles/file/begavavigizafigefetok.pdfIn PDF document text
    • https://mahae.hu/files/files/63871216869.pdfIn PDF document text
    • https://fulzugaskozpont.hu/files/dabometatufufewadunen.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/kusol.pdfIn PDF document text
    • https://theurbanthinktank.com/files/70987134169.pdfIn PDF document text
    • https://cordovajewelry.com/images/file/ponugibupeweponab.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/2f439a2afb9ad371323dcabeba7ae2b0/jimanox.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/53126584163.pdfIn PDF document text
    • http://delfosventures.eu/userfiles/files/35186411657.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138779d039aa---2242358541.pdfIn PDF document text
    • https://geneolock.com/ckfinder/userfiles/files/60177344883.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/bekifuvubujovixesomo.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/rajowenasaramuduk.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_off0000dcfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFC 10204 bytes
SHA-256: c328a7af82f03ba0659685fb2f0359d212e56ebca77da7d83674335b192f4e78
font_01_sfnt_off0000f3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E4 17440 bytes
SHA-256: 62da74cb7f0d72ebac47a4cbcba3405562048a1373fd503452a65426d59aa952
font_02_sfnt_off00012107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12107 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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