Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbab68c8e762055a…

MALICIOUS

PDF

87.5 KB Created: 2021-08-01 00:19:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9fc63d451e390af6841c83e8c19aa2f0 SHA-1: b4755155bd9037995be53a862600f6b9b32b188f SHA-256: bbab68c8e762055a37601a7dbfc7d0c3a7ebd18356b04c44387f9016ad39ef45
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The PDF contains a 'Clipboard command execution lure' heuristic, indicating it instructs the user to copy and paste content into a shell. This is a common technique for downloading and executing secondary payloads. The ML classifier and ClamAV detection strongly support its malicious nature, and numerous URLs hosted on compromised or disposable domains suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cosmic-kino.ru/sadm_files/pokaxijerisus.pdf In PDF document text
    • http://nieruchomosci-swidnica.pl/userfiles/file/5900653217.pdfIn PDF document text
    • https://www.sacict.or.th/ckfinder/userfiles/files/60172178315.pdfIn PDF document text
    • http://sarlampa.ru/upload_picture/gogudamowibi.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf506bdcbf---15674929314.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa07887c5c4---jofosuvujogezefaline.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba36828625a---fajegexenipadeduj.pdfIn PDF document text
    • http://ikkosushi.com/uploads/files/98183630821.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/f411284267cb7585f6e31dbec70649da/tavugopiboxaroxured.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cff035e0a5---mixesodojefet.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/fd1c6ab9bd86b035efed6d5a9aa443b5/54821231158.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/d48142112d24e1a9f9b29bcee90ee259/kuzubezozi.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160896c1cd9cb1---vowidavanomexufilif.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/6216997fd3f98488809a307d838fe9c6/mozeput.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/54c6a942d503c0f318bd030df6989af7/66962589319.pdfIn PDF document text
    • http://bsa.by/ckfinder/userfiles/files/89322411006.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c444dab2c6f---masiravawosov.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/lunezoposikonujo.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/loguvukulinelidiwimod.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16099578447524---87707288644.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/lawovifara.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/tidilumos.pdfIn PDF document text
    • http://change4best.ru/upload/file/bevukelofox.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/7b6d2e558aa8a6e78445c4bf86481e3e/67645033769.pdfIn PDF document text
    • http://kusadasidentalclinic.com/img/userfiles/files/vigasumaso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+reduce+pdf+file+size+without+losing+quality+illustratorPDF 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_off0000f0d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D6 17080 bytes
SHA-256: 29dbbbb86360db3a3526617d8c1c1e11ce5c83bae4d24d692d00c03f553804f5
font_01_sfnt_off00011cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CDD 11396 bytes
SHA-256: 04083bc28957a81ef1244df68dd7742534406acd7470861548a68a1fdaf4f233
font_02_sfnt_off00013736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13736 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1