Malicious PDF — malware analysis report

Static analysis result for SHA-256 d20864261c8de625…

MALICIOUS

PDF

88.0 KB Created: 2021-09-14 07:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 320821177dc07dbb0b403c363cc9adf7 SHA-1: f121b6c3680d867e7ef314d3dbcd4be252ae1985 SHA-256: d20864261c8de6257f703f768a399e1f6e5fc1a6660b37277c0c74cc1379b8f7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to disposable domains, which is characteristic of phishing or link-farming operations. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cdd9a581a0---tesikuduzigetepis.pdf In PDF document text
    • https://palcev.ru/userfiles/file/9295341065.pdfIn PDF document text
    • https://fentesmakina.com/paket/upload/files/fabagulupi.pdfIn PDF document text
    • http://saxonrt.hu/img/userfiles/files/87538961435.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/gurinafepigaguwupefafewe.pdfIn PDF document text
    • https://comfort8889.com/upload/files/51351798360.pdfIn PDF document text
    • http://7sate.com/filespath/files/20210913135123.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613db67ecd958---xodivavi.pdfIn PDF document text
    • http://mn-print.ru/ckfinder/userfiles/files/xutesifafotaduxezugur.pdfIn PDF document text
    • http://suchanekstomatolog.pl/files/file/zirepa.pdfIn PDF document text
    • https://ylwlgwadmin.ylwl.cn/upload/files/gizevozowofaxominoxefiz.pdfIn PDF document text
    • https://www.aicsmindia.org/ckfinder/userfiles/files/59080726202.pdfIn PDF document text
    • https://konteshamamotu.com/userfiles/file/92001857211.pdfIn PDF document text
    • http://kkslavicin.cz/sites/default/files/file/zojazumawegurugopakak.pdfIn PDF document text
    • http://mitroc.com/userfiles/file/2668657419.pdfIn PDF document text
    • http://intproplaw.com/admin/uploads/file/3181137923.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/97762774004.pdfIn PDF document text
    • http://studiopol.com/userfiles/files/jedubamabimosagogika.pdfIn PDF document text
    • http://netdepphunu.vn/images/userfiles/file/88009446681.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-2/20210902052436870875.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=ranger+barrel+id+unturnedPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF390 10420 bytes
SHA-256: 536f71d7e28e8af6d03df5574125249973dde5a04a16f3bd8aedb9fba0bda19c
font_01_sfnt_off00010b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B03 17976 bytes
SHA-256: 45b00a85863081c379d4d075f3c5904b2705c73f518e9cfecb5454dc1a386cc3
font_02_sfnt_off0001390d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1390D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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