Malicious PDF — malware analysis report

Static analysis result for SHA-256 945be77d027efe1e…

MALICIOUS

PDF

82.6 KB Created: 2021-09-19 08:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: bdae9ea12a428e5da51be73f2faf81c5 SHA-1: 76c0c02f601214c4535a7f90c2819057b0f5c7b6 SHA-256: 945be77d027efe1e970dc10ea965c454d051825aaed4ef0d108711f842dded91
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the PDF is part of a link farm on disposable hosting, pointing to a likely phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious content.

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://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/161364e3b2f277---8996123455.pdf In PDF document text
    • https://onlinendttraining.net/files/zuwuninitefote.pdfIn PDF document text
    • http://foxadv.net/file/74919473187.pdfIn PDF document text
    • http://3wsystems.com/shipinc/userfiles/files/kimudelatezen.pdfIn PDF document text
    • https://grafconsulting.pl/Upload/file/61882425869.pdfIn PDF document text
    • http://venkateshservices.com/uploads/84312924561.pdfIn PDF document text
    • https://rainbowprinter.com/app/webroot/files/file/20488454847.pdfIn PDF document text
    • http://vuason.vn/upload/files/52908352428.pdfIn PDF document text
    • http://zhxndl.com/uploadfiles/files/gojivurujebaxemut.pdfIn PDF document text
    • http://sumbulefendiegitimvakfi.com/resimler/files/95345132265.pdfIn PDF document text
    • http://xn----7sbbgprpk7biiq.xn--p1ai/admin/ckfinder/userfiles/files/74670479487.pdfIn PDF document text
    • http://only-svet.ru/upload/files/guwovuligesirom.pdfIn PDF document text
    • https://promise-land.com/upload/file/86413674001.pdfIn PDF document text
    • http://studiotipaldo.com/userfiles/files/lirowanukizubaromowivebek.pdfIn PDF document text
    • https://www.sterlingsez.com/ckfinder/userfiles/files/53645471167.pdfIn PDF document text
    • http://opgzvh.hr/upload/file/53961051645.pdfIn PDF document text
    • https://konzolstudio.ro/uploaded_files/file/31531864041.pdfIn PDF document text
    • http://stapper.de/sites/default/files/userfilesfile/gifibinakimutijage.pdfIn PDF document text
    • http://bakineshr.az/ckfinder/userfiles/files/55382521001.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/genuwudokowazizavuru.pdfIn PDF document text
    • https://durimawar.com/contents/files/xutexirinaxiriborefuwo.pdfIn PDF document text
    • https://mbzgogo.xyz/web/img/podborky/files/31748433096.pdfIn PDF document text
    • http://gpba.ge/admin/ckeditor/ckfinder/userfiles/files/jugozopigobupukal.pdfIn PDF document text
    • http://www.dilipprabhavalkar.com/images/file/42381555719.pdfIn PDF document text
    • https://akilanews.com/ckfinder/userfiles/files/11728276709.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=fce+listening+practice+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_off0000dd80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF592 18040 bytes
SHA-256: f9e2e61822a79a64554fa2b1d1b18664dca2820701fe252419109ab8c186ce7a
font_02_sfnt_off00012461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12461 10652 bytes
SHA-256: 263d35c6431549d785bbfd9ebb7bc15895d6b0c31367b1d19c9e812abb39d8ab

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