Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb46bda4e931cc52…

MALICIOUS

PDF

68.8 KB Created: 2021-10-04 09:10:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: ed943407020126833c1ef5e79af52dfb SHA-1: 704e8a0f72e59343baa59df7f933b69337f57f02 SHA-256: bb46bda4e931cc52833b832e87e8ed2fea3ba5c1eb916f6ea5cacd7a99078141
126 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV. Static analysis revealed a PDF document containing a high number of embedded URLs, many pointing to potentially disposable domains, indicative of a link farm. This suggests the document's primary purpose is to redirect users to external sites, likely for phishing or to serve further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://ciccioinpentola.com/userfiles/files/xokilowajuxi.pdf In PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16139fbc344c0c---puzonezo.pdfIn PDF document text
    • https://abcelectricalonlineshop.brilliantwebtech.com/userfiles/files/64019432508.pdfIn PDF document text
    • https://minhvuongthuphap.com/upload/ck/files/wulebu.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16159b4a97f84d---zududok.pdfIn PDF document text
    • https://aymexco.eu/ckfinder/userfiles/files/kiweguvilaxeb.pdfIn PDF document text
    • https://afgventuregroup.com/cfiles/file/16166670656.pdfIn PDF document text
    • http://op-gold.com/ck_image/files/lopupale.pdfIn PDF document text
    • https://ibexquimica.com.br/ckfinder/userfiles/files/23847374758.pdfIn PDF document text
    • http://sage-chem.com/image/files/20211001_005028.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16134b1513719f---xexovotifamok.pdfIn PDF document text
    • http://studiopassarotti.it/userfiles/files/pijibuxokusopok.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/gisejukokunemo.pdfIn PDF document text
    • https://hotelcorona.ro/files/99692180189.pdfIn PDF document text
    • https://printsolutions.ro/uploads/wysiwyg/files/wafag.pdfIn PDF document text
    • https://mcdelandes.ca/uploads/file/60235112786.pdfIn PDF document text
    • https://clubon.top/uploads/files/44456851894.pdfIn PDF document text
    • http://mcserpenti.com/userfiles/file/borurog.pdfIn PDF document text
    • http://webinaris.blog/ckfinder/userfiles/publics/files/tuvenirinox.pdfIn PDF document text
    • https://liepasmuiza.lv/userfiles/library/17346964634.pdfIn PDF document text
    • http://linhkienhunganh.vn/luutru/files/45816757932.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=what+is+hydroelectricity+how+is+it+producedPDF 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_off0000af80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF80 14460 bytes
SHA-256: cfea96eb441cf0b855cdfd9c6b622229bdf44567f0a5f0cdc0db9401ceedde42
font_01_sfnt_off0000d401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD401 10800 bytes
SHA-256: 4e2a95dab0d43161e0d5dead0dc89fb6f06217ed6083b1fcec162c9e43dbe782
font_02_sfnt_off0000ed1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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