Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0c42a925e03be6…

MALICIOUS

PDF

70.3 KB Created: 2021-09-29 09:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4dcba0cb0b38465a72ca63da4e9711e7 SHA-1: f14d7f5cecb4eb3e30fbc27ca8d25a43ee98b17a SHA-256: cc0c42a925e03be68c17c40e936ca4762dbc76eaf44016b874c934f11bb49901
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external URIs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly indicate malicious intent. The embedded URLs, such as 'https://philabc.ru/uplcv?utm_term=windows+7+latest+version+iso', are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://philabc.ru/uplcv?utm_term=windows+7+latest+version+iso PDF link annotation
    • https://saya.ro/app/webroot/files/userfiles/files/955745167.pdfIn PDF document text
    • https://qematalsihha.com/ckfinder/userfiles/files/fararowatozu.pdfIn PDF document text
    • http://nyitotthaz.hu/userfiles/files/wuloberagotowazafo.pdfIn PDF document text
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/putodoki.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/53567485458.pdfIn PDF document text
    • https://fototipia.hu/files/files/zulaluxipomogemifa.pdfIn PDF document text
    • https://minlinart.com/archive/upload/files/94672517236.pdfIn PDF document text
    • http://novichiha.ru/pic/file/momewavadekurojedeb.pdfIn PDF document text
    • http://ehoron21.mn/uploads/files/butisovofoxumuginadazipip.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/jidige.pdfIn PDF document text
    • http://xatrbio.com/userfiles/file/zejedabil.pdfIn PDF document text
    • http://ooexperience.be/assets/Image/files/vetawugofilisiwuladorolov.pdfIn PDF document text
    • http://cameralehiep.com/hinhanh_fckeditor/file/62473897825.pdfIn PDF document text
    • http://szamosiszerviz.hu/feltoltott/files/dironuvomo.pdfIn PDF document text
    • https://oasis-travel.ro/files/dixewiwurotagaminudabiva.pdfIn PDF document text
    • http://teifsepahan.com/files/file/kikafi.pdfIn PDF document text
    • http://upakuika.com/img/file/15676633377.pdfIn PDF document text
    • http://rotarybrescello.it/userfiles/files/kofupuxuwegimit.pdfIn PDF document text
    • http://full814.com/upload/files/kefol.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16131ccfd2e614---vuvilewogaperepa.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/bpaoqm6oe4eqe5u4eef9u7ica7/mopalamabefevetozejepikit.pdfIn PDF document text
    • https://pmapmc.com/userfiles/image/files/69557899511.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_off0000b174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB174 10436 bytes
SHA-256: 4363fe96d59799343dddd785379e41ea41ac7ef1cbf6af04941ce435bb887ed5
font_01_sfnt_off0000c959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC959 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e16b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16B 16456 bytes
SHA-256: df6df647c693f380a85fceb3591cfc547ad6c3831a82a268f3a34227e559cad6

Open this report in the interactive analyzer, or submit your own file for analysis.