Malicious PDF — malware analysis report

Static analysis result for SHA-256 d219ccdf83b232ea…

MALICIOUS

PDF

82.1 KB Created: 2021-09-17 18:24:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e8469740f17ac0f54e2d67c5915acd63 SHA-1: de41be6a464a522f7f21a124b3f02b9221481dd2 SHA-256: d219ccdf83b232ead13d876bd82f6d06b8718b08ab04ece5b001817eb377c0b6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, indicating a link farm or redirection scheme. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' strongly suggest malicious intent, likely for phishing or distributing further malware. The ClamAV detection confirms its classification as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://oniceh.ru/uplcv?utm_term=why+is+my+android+not+sending+pictures PDF link annotation
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fadowija.pdfIn PDF document text
    • https://yennenga.org/business_school/uploads/file/parazuxapapexusilex.pdfIn PDF document text
    • https://angkaganjil.com/contents/files/xigerakegitutanew.pdfIn PDF document text
    • http://lycee-elm.com/userfiles/file/14397287382.pdfIn PDF document text
    • https://karpataljaturizmus.hu/upload/93304102751.pdfIn PDF document text
    • http://mskabel.cz/UserFiles/File/89484395208.pdfIn PDF document text
    • http://sutinlawkrabi.com/ckfinder/userfiles/files/tolatonawarufigof.pdfIn PDF document text
    • http://zensushialiso.com/uploads/files/47779374949.pdfIn PDF document text
    • https://manorhair.com/uploads/files/202109102358435075.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/femawulakafo.pdfIn PDF document text
    • https://krusomying.com/data/file/kivasurigul.pdfIn PDF document text
    • http://hanleyresources.com/images/62083258584.pdfIn PDF document text
    • https://mallarpurnaisuva.org/go/file/65682199747.pdfIn PDF document text
    • http://skupka23.ru/upload/m/widurerevatadelesivoxome.pdfIn PDF document text
    • http://paraglider24.de/pics/fotos/1/file/sifuvuxagepakitanad.pdfIn PDF document text
    • http://pnlestari.com/visitbali/image/files/tanowiweg.pdfIn PDF document text
    • https://jdsliquorlocker.com/nbloom/fckuploads/file/digilolovadiburo.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613112cc2935f---kafewajed.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/padozod.pdfIn PDF document text
    • http://oembag.com/uploads/files/202109031810446729.pdfIn PDF document text
    • http://study4student.com/cache/fck_files/file/kofilezorivixab.pdfIn PDF document text
    • http://www.neoneophytou.com/ckfinder/userfiles/files/84237380344.pdfIn PDF document text
    • http://ndt-ultratech.com/files/45172886436.pdfIn PDF document text
    • http://yibetter.com/data/files/20890343380.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_off0000db76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB76 17680 bytes
SHA-256: f4ceb73634d8a4e668e0b6b19ddf74a674a75ea893db6db9931a8707589dbec0
font_01_sfnt_off000108ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12105 11120 bytes
SHA-256: ac269c8c82b24ceb4e9c324308648ad4974efb778a02adc0e00b53acd5a6f2a0

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