Malicious PDF — malware analysis report

Static analysis result for SHA-256 d364635a259c00cd…

MALICIOUS

PDF

74.8 KB Created: 2021-09-05 20:12:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 674ee8400ba169bd627524287a3fcca4 SHA-1: 1d1763d5f8cf6857863a5d0b5343d092a5407502 SHA-256: d364635a259c00cdcc94e3e170e8f849eac5dfe672c06677ac6f1a7ccfadfc69
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting. These links likely serve as lures for phishing attacks or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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 https://duproject.com/uploadEditor/files/favofitonizez.pdf In PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/6e5e81457c7acc88d6faf14a4f2b5f1d/66389873091.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16097b4e9db0f4---mosudonufitujekuxixo.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1606c959965fbb---28173133475.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/161248dea5909f---74534041176.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608607416c681---3258910629.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/paremevaperado.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5da9abe28---kejigiwupotibezejolediz.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/ridenogaxopukejemipiseg.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/nuxapibolaxiwasoke.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/2pbmb0n43p6c0982quvd630b81/banavoja.pdfIn PDF document text
    • http://tele-video.ru/upload/files/81468213386.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/95915451661.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a330049a2---satusuduzaziku.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/39692035553.pdfIn PDF document text
    • http://votava2.altrodesign.eu/ckfinder/userfiles/files/sazaxodobupo.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/kijigixawatokikuw.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/d55398a510bdc8d5eaac732a91f34200/paxujogidafuja.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/1e419c4505219b20bae17027d3ebcd81/gegivolozakelugoleta.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e553d181641---vulifiropovin.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/c3acba4055ba4c7ee6ff10822676af3c/34256866999.pdfIn PDF document text
    • http://mail.teleserviciomalaga.com/ckfinder/userfiles/files/88659786833.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/f367ff8564cbd4221ac08598d2143f2e/24502011741.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=simplissime+couture+pdfPDF 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_off0000c193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC193 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d9aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AA 10692 bytes
SHA-256: 3a0604a16ad2150e2f2a71560d912a1f309d8b609199105b387c4b51edbb18b8
font_02_sfnt_off0000f225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF225 16908 bytes
SHA-256: 155ac5f74253d1a3ff122ba76bcbe60baa3bc682d014cd2fb9ad84d1f24f7908