Malicious PDF — malware analysis report

Static analysis result for SHA-256 732db0ecb6006934…

MALICIOUS

PDF

69.0 KB Created: 2021-09-30 18:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 21de3159d77e33122aed8142db97a31a SHA-1: 78311e2621e8e78003d6d05a4298888b55cb9428 SHA-256: 732db0ecb6006934b0dabdd1e512c31ae7bfcac2986abac81d4074817b9298ad
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many of which are hosted on disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded URLs point towards an attempt to redirect users to malicious content, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://coretry.ru/uplcv?utm_term=breench+jig+trap+saw+game PDF link annotation
    • http://shinies.ru/img/lib/file/liwapunimewizuzid.pdfIn PDF document text
    • http://yevres.fr/ckfinder/userfiles/files/19908481739.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/vugakexejupodimox.pdfIn PDF document text
    • http://villacappuccina.com/userfiles/files/patixunubawesufasolu.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/ebe80926c83bd8a2d114f717f4e5d004/dedike.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/gorulibezox.pdfIn PDF document text
    • https://auto826.vnpec.xyz/uploads/files/93513511296.pdfIn PDF document text
    • http://www.w.radeton.cz/ckfinder/userfiles/files/88551500476.pdfIn PDF document text
    • http://dxqzx.com/ckfinder/userfiles/files/20210921_160607.pdfIn PDF document text
    • http://dbexpertise.fr/catalogue_dynamique/file/zudojataxubezokojoz.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/8914270851.pdfIn PDF document text
    • http://karinameal.ru/imgdish/files/31066950375.pdfIn PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/40015800226.pdfIn PDF document text
    • http://abworder.com/uploads/files/6294856085.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613e1753da1e5---64091036018.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/6066156126.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/tejosukivijozamet.pdfIn PDF document text
    • https://majubesar.info/contents/files/luvevekuwanederasalebo.pdfIn PDF document text
    • http://1qjd.com/upload/files/2021-09-26-10-31-08-cwboKDzw.pdfIn PDF document text
    • http://kmbb.at/userfiles/file/7528084041.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/wupikewufomijivebidigufej.pdfIn PDF document text
    • http://kriosispl.com/cote_dor_import/admin/ckfinder/userfiles/files/38428692055.pdfIn PDF document text
    • http://quantri.thaisonpalacehotel.com/upload/files/nirer.pdfIn PDF document text
    • http://koreadramatour.com/FileData/ckfinder/files/20210929_0477598B7AD48E8A.pdfIn PDF document text
    • http://cuacuonnhaxuongbinhduong.com/upload/files/53720855551.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_off0000aeb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEB0 10924 bytes
SHA-256: 6e5d5bc6ffb5ec336c380a24b93fc5a0a460a02caff21e52490b0edd1ebd125b
font_01_sfnt_off0000c7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D5 15148 bytes
SHA-256: 53f3dffa9ac1fefa0b4e70e925de6d7061f306bba5deeebc03b09c7788d117d3
font_02_sfnt_off0000ee41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1