Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcdd08fe8d41186f…

MALICIOUS

PDF

76.2 KB Created: 2021-10-05 03:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 407df096fba19b8bd9e9f505cff72495 SHA-1: 10ae8f5d7defe9e7bf40d6bbf9f0ea71c2de6c81 SHA-256: fcdd08fe8d41186f40d6d8581c50ef3d027cd090122e3dfb5cc40f9ec5537f85
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host numerous links on disposable domains, likely to obscure the ultimate destination and evade detection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://smidgel.ru/uplcv?utm_term=exclusion+list+meaning PDF link annotation
    • https://dmshospital.com/mm_engg/files/mosikexizataguxun.pdfIn PDF document text
    • http://laros.cz/UserFiles/file/51231514040.pdfIn PDF document text
    • http://apnschool.in/singhania/downloads/file/56201060008.pdfIn PDF document text
    • https://jordanadams.com/ckfinder/userfiles/files/nutoduweromiwusorurigeb.pdfIn PDF document text
    • http://vibrator4you.cz/UserFiles/File/juduxujuvonubopi.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/44351212457.pdfIn PDF document text
    • http://archissimo.eu/userfiles/files/ximifejiretufufuwidimi.pdfIn PDF document text
    • http://www.salpasafarit.fi/tiedostot/files/16632776865.pdfIn PDF document text
    • https://sapsda.com/SapmaUserfiles/file/sukelomuro.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/jodagazolomowi.pdfIn PDF document text
    • http://cuacuontoanthang.com/media/file/gujivewexegugur.pdfIn PDF document text
    • http://ewtch.com/upload/files/69165250954.pdfIn PDF document text
    • https://tyko.pl/userfiles/file/44356958643.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/94814524711.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/vofisubifoser.pdfIn PDF document text
    • https://sealordhotels.com/ckfinder/userfiles/files/mulune.pdfIn PDF document text
    • https://sagarexpress.com/userfiles/file/72672149076.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/zejaselosepalixi.pdfIn PDF document text
    • http://jolanyee.com/upload/files/202109060038188409.pdfIn PDF document text
    • https://euinsuti.uniluxgym.ro/app/webroot/files/userfiles/files/65608937906.pdfIn PDF document text
    • http://autavrabek.cz/obrazky/file/48932114800.pdfIn PDF document text
    • https://irastuff.com/admin/ckfinder/uploads/files/neder.pdfIn PDF document text
    • http://moutierrozeille.fr/userfiles/file/79667916164.pdfIn PDF document text
    • http://careerpathrecruitment.com/swapscan/app/webroot/js/ckfinder/userfiles/files/36128290815.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_off0000c6d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D6 17344 bytes
SHA-256: 6a7a4eb3bbe5dc90064e60ef22a1e366b391efdec933242785711168871ded52
font_01_sfnt_off0000f312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF312 10660 bytes
SHA-256: 894ce03b84b25044327d4b22af47efffc013543451cfb3002aee4969cceec009
font_02_sfnt_off00010b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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