Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e24a8f923e1ca0…

MALICIOUS

PDF

81.3 KB Created: 2021-10-20 02:15:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: b187557f66d1ad78852b2ea7cb4b5207 SHA-1: 34f28dce160babc6ac901ec49c7eb515d60bbd38 SHA-256: 36e24a8f923e1ca0f56e23c78248c82c0e90f21c723015ed35af58992cd1bfd0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains numerous links pointing to disposable domains, a common tactic for phishing and distributing malware. While no scripts were explicitly extracted, the nature of the PDF and its link farm suggest it is intended to lure users to malicious websites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://landtop.com/filespath/files/20210927235255.pdf In PDF document text
    • http://gcsiva.com/files/userfiles/file/64190902830.pdfIn PDF document text
    • http://duquenne-moteurs.fr/webroot/upload/files/53274526951.pdfIn PDF document text
    • http://starwindows.ie/ckfinder/userfiles/files/nizifizamakatufev.pdfIn PDF document text
    • http://mq-water.net/upload/bilagawilizodigo.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16147bf299617b---degetanovazufenezekexat.pdfIn PDF document text
    • http://ovecollection.com/royal/admin/images/products/file/24953389107.pdfIn PDF document text
    • https://newsale.linyn.mobi/upload/ckeditor/pages/files/lutafelo.pdfIn PDF document text
    • https://mimpishio2bet.com/contents/files/jilewigojokafo.pdfIn PDF document text
    • http://kiuanai.com/userfiles/file/varubivowilipirutovekusev.pdfIn PDF document text
    • https://vatlieuchongnong.baohohoanglong.com/userfiles/file/85960039565.pdfIn PDF document text
    • https://leonardscopysystems.com/home/leonards/public_html/ckfinder/userfiles/files/lunugujuxoj.pdfIn PDF document text
    • http://profesniprukaz.cz/ckfinder/userfiles/files/rejapexugakituxatufem.pdfIn PDF document text
    • http://oprandi.it/userfiles/files/79338168331.pdfIn PDF document text
    • http://thienlongadv.com/upload/files/moxulobadipobezev.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/97041669836.pdfIn PDF document text
    • http://avalon-essenzen.at/userfiles/file/40844829802.pdfIn PDF document text
    • http://royal-pizza.eu/files/file/38092434588.pdfIn PDF document text
    • http://maginsaatmetal.com/resimlerfiles/popomo.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/5d59eda2654186bff4bb186af8dcdcb0/pegaja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/BcFPVxLj4jw/uplcv?utm_term=que+es+la+estructura+de+un+texto+literarioPDF 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_off0000d24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24C 10624 bytes
SHA-256: 1f741cb59b61ad47b720553edee81ac072bd4392582360a848ad754ae5472346
font_01_sfnt_off0000eada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADA 20952 bytes
SHA-256: d985ad7082e0b887c090a735adc0fa471ed3ca7a14af55c7b57cddd63d0297b6
font_02_sfnt_off00011fd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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