Malicious PDF — malware analysis report

Static analysis result for SHA-256 035d32b7b29c06d0…

MALICIOUS

PDF

75.6 KB Created: 2021-09-25 11:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 34db7e5b7081a601719950fb8419a21f SHA-1: de41b4a95be63452a6a227a36ca733b93c4f6144 SHA-256: 035d32b7b29c06d0c7b4564615e6b437c2d663c5a0402abb9ce665a80c9c4612
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to other PDF files hosted on a variety of domains, many of which are flagged as unknown or potentially malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed as a link farm, likely to distribute malicious content or engage in phishing. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://ww150005.linebot.net/upfile/files/20210907153319.pdf In PDF document text
    • https://carpenterstouchnj.supremeroi.com/FCKeditor/file/linakumaluguke.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210913_0680BAC06EEBBE9B.pdfIn PDF document text
    • https://madeirashopping.com/userfiles/file/xumowaronigirefonijami.pdfIn PDF document text
    • http://kondicionery-himki.ru/upload_picture/file/59525703896.pdfIn PDF document text
    • http://tsnpharma.com/upload/files/jisojefo.pdfIn PDF document text
    • http://recviem.ru/img/upload/basopusakorefadumasol.pdfIn PDF document text
    • http://pscworld.eu/ckfinder/userfiles/files/zutekutudobupajitefal.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210923_171214.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__613D63E5DF34F.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210918060739_d682jg.pdfIn PDF document text
    • http://surestegc.org/documentos/file/suduvagederipugojugiwu.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/jinixuwekevuratonigepup.pdfIn PDF document text
    • http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/9453289933.pdfIn PDF document text
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/bapemuvo.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/pipapanabatajem.pdfIn PDF document text
    • https://halkapsikoloji.com/userfiles/file/69404779781.pdfIn PDF document text
    • http://motocams.cz/ckfinder/userfiles/files/javekilozirizol.pdfIn PDF document text
    • http://ekopaczka.pl/imgbrama/files/13473038974.pdfIn PDF document text
    • http://cdmvt.cz/sites/default/files/53680456810.pdfIn PDF document text
    • http://aa-nusd.jp/ritekebowixisom.pdfIn PDF document text
    • http://clairerolo.com/userfiles/file/54496792568.pdfIn PDF document text
    • http://studiofelician.com/userfiles/files/86986956745.pdfIn PDF document text
    • https://red-adlay.com/upload/files/28921235048.pdfIn PDF document text
    • http://edilcfcostruzioni.com/userfiles/files/12286084410.pdfIn PDF document text
    • https://www.luthier-auxerre.fr/ckfinder/userfiles/files/rofawovam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=ejercicios+de+presente+simple+en+ingles+pdfPDF 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_off0000bd59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD59 19452 bytes
SHA-256: ed202d3b9fe35219bc1431541c0ef9d76ec92dda0da2ddc14567beaec52392b4
font_01_sfnt_off0000ef6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10781 10916 bytes
SHA-256: e405ba2794fa8f1100f14a28b8d8d53e8012997a26f3dcdf078eeec03f766bd5

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