Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd14233eb069ada…

MALICIOUS

PDF

83.8 KB Created: 2021-09-09 07:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 542c60b062c4fc5fc55879583e93d4ed SHA-1: e0baa8d0f63fcb20a6905ac149047d8cfd053afb SHA-256: ddd14233eb069ada27c349bbfe8fda5f30e85ce67eb4c9eb4e1030be5bc561c1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://eventclub.pl/userfiles/file/37512953953.pdf In PDF document text
    • https://signatureshreyas.in/userfiles/file/17499785536.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/butujizo.pdfIn PDF document text
    • https://toananhmedical.com/uploads/files/titosuvikojujavusutefa.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/73431920749.pdfIn PDF document text
    • https://efnnma.org/files/file/wugewifazowera.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/mibubuputamugemoxuxu.pdfIn PDF document text
    • http://brno-skoleni.cz/ckfinder/userfiles/files/5656055242.pdfIn PDF document text
    • http://veterinariacomportamentale.it/userfiles/files/xududusitafonatovixat.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/lonofibixojugonikidewo.pdfIn PDF document text
    • https://nutrishop.in/ci/userfiles/files/84584223816.pdfIn PDF document text
    • http://elfuklid.cz/foto/Image/file/kidilajegabevojake.pdfIn PDF document text
    • http://shopabrang.com/images/files/nevixaxixolur.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/fikojetibug.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210901210651.pdfIn PDF document text
    • https://www.wemservice.com/ckfinder/userfiles/files/rekitadozalinusexilorof.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613926b295865---87340815396.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/45577145089.pdfIn PDF document text
    • https://windscrm.net/files/file/75244965041.pdfIn PDF document text
    • http://shamayachts.com/upload/file/7983545215.pdfIn PDF document text
    • http://carszana.com/image/upload/File/kumopipokedejivubebuvo.pdfIn PDF document text
    • http://atya.eu/files/file/gemevikununu.pdfIn PDF document text
    • http://hflbdq.com/uploads/file/070614232120.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-09-04/images/files/59046486446.pdfIn PDF document text
    • http://newcityhk.com/userfiles/41984168906.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=android+on+vodafonePDF 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_off0000da7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7F 22256 bytes
SHA-256: d6e56f86e7849682db10fedad229b1716f82b49ac48e24543fe545102c10748f
font_01_sfnt_off000112f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F6 10084 bytes
SHA-256: ea3d3b1e114c996fc6ff0b9d6d1cf750c88a2790848c8612988fd9463c987d99
font_02_sfnt_off00012988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12988 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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