Malicious PDF — malware analysis report

Static analysis result for SHA-256 dad06bb2daffc387…

MALICIOUS

PDF

69.7 KB Created: 2021-10-02 10:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f328df641591dc88458d7d86eda8274d SHA-1: 83151367024fccaf9e6e8bd6a6818271a9c68fbe SHA-256: dad06bb2daffc3879398db123ac0d69108699bc2078a1d89ff04600546f5d619
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=our+lady+of+soledad PDF link annotation
    • https://holyfamilyhospitals.com/ckfinder/userfiles/files/logufefan.pdfIn PDF document text
    • http://musicpark-live.com/userfiles/file/2009888639.pdfIn PDF document text
    • http://campingwithconvenience.com/files/files/16121843973.pdfIn PDF document text
    • http://kjphotocon.org/data/userfiles/files/sofuvekudipeteliruwelop.pdfIn PDF document text
    • https://comfort8889.com/upload/files/86850788143.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/gojinotuzomewixewelira.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/filejebarofo.pdfIn PDF document text
    • http://icaalliance.org/filespath/files/20210929014757.pdfIn PDF document text
    • https://thietbivesinhanhhuy.com/asset/files/fuduja.pdfIn PDF document text
    • http://starwindows.ie/ckfinder/userfiles/files/90695993004.pdfIn PDF document text
    • http://cochemical.com/upload/files/rajemixukonibizezebu.pdfIn PDF document text
    • https://aprenda-atdi.com/uploads/files/sagivodawuzaberafuba.pdfIn PDF document text
    • http://lactopad.com/uploads/files/45050843042.pdfIn PDF document text
    • https://stephankeppel.com/userfiles/file/laregixida.pdfIn PDF document text
    • http://ncteonline.com/userfiles/file/31970895899.pdfIn PDF document text
    • http://briquettemachinery.com/d/files/rodod.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613e089f71f2a---risowew.pdfIn PDF document text
    • https://tefen67.com/userfiles/files/makesiniz.pdfIn PDF document text
    • http://perfectionistpaintingnj.com/ckfinder/userfiles/files/jofevefirug.pdfIn PDF document text
    • http://cabini.it/userfiles/files/82020773877.pdfIn PDF document text
    • https://www.autopsrus.com/ckfinder/userfiles/files/dafexavuviwukaxovi.pdfIn PDF document text
    • https://gtpoznan.pl/cms/files/file/58571665814.pdfIn PDF document text
    • http://cserepakciok.hu/xdata/file/6200035616.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_off0000b144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB144 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC956 15920 bytes
SHA-256: 3dd9661419d8a46f8e5592607638759a07ae8d8100a3e218237e0825172db9f5
font_02_sfnt_off0000f1b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B0 10292 bytes
SHA-256: 3e8ce31c12fa1f3df07e10a7f1c2c25bfe7e6fae27737169209e75c1352e6419

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