Malicious PDF — malware analysis report

Static analysis result for SHA-256 696dd4f854045320…

MALICIOUS

PDF

82.0 KB Created: 2021-08-19 21:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 48e9b5e04e8f5a29f99313d9f75e0b67 SHA-1: 82c18fcd974a6d46d9139e1ca85922a137be4ce7 SHA-256: 696dd4f85404532052b9dd90e9d85f360a3a904c6233f24a463f400d7386375d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It functions as a link farm, directing users to download potentially malicious files disguised as free books, hosted on compromised WordPress sites. The presence of multiple external URIs and a link farm structure on disposable hosting indicates a deliberate attempt to distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://krisoc.ru/uplcv?utm_term=scribbling+pain+book+pdf+free+download PDF link annotation
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608921828b4c7---katozupikun.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b63123d997e---zevorowonanutituzefebu.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ed623da78---bojujaranafitipud.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/58526105928.pdfIn PDF document text
    • http://www.fd.ntou.edu.tw/ckfinder/userfiles/files/39953589121.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/mevineguxadogenupigeb.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/patalasegusagojefaxadeniw.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210511025606_1354524459.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607173fc65a93---70929690791.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c118b6cce83---99890651493.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/spp01k0mket719bb2o5de7l960/24324104431.pdfIn PDF document text
    • https://blokhol.com/upload/files/zulikijetek.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/f4458a8d0428c23429fd5698acfe1878/40961852626.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075324129a21---65994704513.pdfIn PDF document text
    • http://inwama4.vn/webroot/img/files/70607085349.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/medibapoxorezufikasixigo.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092459b0e613---30768278994.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/57073132559.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/19902218133.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/80593244537.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075f71967e18---mefifojurokanuj.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/457bd97252c6d1758754b80b93c885ff/99541649932.pdfIn PDF document text
    • http://rford67613.com/clients/a/a2/a20594cba7d6fe247bc87ef9b80620db/File/fakoduvuvivunemakabateg.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_off0000de98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE98 10924 bytes
SHA-256: b6260e60e3dea13d22e8aaac76e98263b1432c8ab1502eaffe32fb1a1151e2ab
font_01_sfnt_off0000f79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79A 16336 bytes
SHA-256: ced0c0fe47ee35eb508ad24d4f630c46999968fa5d933ab6c6118342000b8d20
font_02_sfnt_off0001220c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1220C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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