Malicious PDF — malware analysis report

Static analysis result for SHA-256 117175bccfa9c03f…

MALICIOUS

PDF

85.5 KB Created: 2021-09-18 22:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1e11b658842a2cbdbc6ab23736a865c0 SHA-1: e7b640dcb2bc324190a926005147a27a8e15784b SHA-256: 117175bccfa9c03fbdeb4bd593f7e39c5401d2cac376237e3904c77035cb9432
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host numerous links on disposable domains, a common tactic for distributing malware or conducting phishing campaigns. While no scripts were directly extracted, the presence of many embedded URLs suggests an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/90d22b293f55f7ad54865ed1cc2a079c/nefovalina.pdf In PDF document text
    • https://3rproject.eu/ckfinder/userfiles/files/bufelinorozonawobifote.pdfIn PDF document text
    • http://www.shjkyq.com/up_files/FCK/file/42814735060.pdfIn PDF document text
    • https://nangluongvada.com/uploads/files/rutufo.pdfIn PDF document text
    • https://ducthai.vn/userfiles/file/dugom.pdfIn PDF document text
    • http://lafenicealcamo.it/userfiles/files/nanelabexafusilelokulen.pdfIn PDF document text
    • http://dsagco.com/Upload/file/46891128129.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/diduzosukelep.pdfIn PDF document text
    • http://www.casasemio.com.br/ckfinder/userfiles/files/jofojiwefosojo.pdfIn PDF document text
    • https://bvphcn.bdata.vn/upload/files/70850220968.pdfIn PDF document text
    • https://iuoshili.com/upload/users/files/vikejo.pdfIn PDF document text
    • http://checopharma.com/upload/files/bowixowopewamividumu.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/ximajesogulavijibexiv.pdfIn PDF document text
    • http://g-shocktou.com/user_file/file/79070931494.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16133350a520c2---36767737363.pdfIn PDF document text
    • http://haphadoor.com/upload/files/25241653.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/woromunoworopibasomof.pdfIn PDF document text
    • http://aolisenjiancai.com/data/files/nafomudojivitigiromo.pdfIn PDF document text
    • https://hoangphatdanang.xetnghiemadndanang.com/uploads/image/files/82971860423.pdfIn PDF document text
    • http://sensor4you.com/fckeditor/editor/filemanager/connectors/php/fckeditor/upload/202109/file/44549630493.pdfIn PDF document text
    • https://senegal4d.com/contents/files/dekisodep.pdfIn PDF document text
    • http://dienvietbac.com/uploads/files/farubemazusumut.pdfIn PDF document text
    • http://antoniolescio.net/userfiles/files/23973549248.pdfIn PDF document text
    • https://dom4m.by/userfiles/files/78117770479.pdfIn PDF document text
    • http://upservice.expert/admin/ckfinder/userfiles/files/dedidifalud.pdfIn PDF document text
    • http://esteel.my/userfiles/file/dogodozopizasusi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=talking+tom+cat+2PDF 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_off0000ee47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE47 10348 bytes
SHA-256: f3f5cf4ff63f4d1e619b749486da3182c1efe0fe02450b3c53a49c739dab1a29
font_01_sfnt_off000105ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AC 16624 bytes
SHA-256: d1a8252d1000e727d82570cba039664edef6919ce6337a920805ae19e7779870
font_02_sfnt_off0001309a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1309A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1