Malicious PDF — malware analysis report

Static analysis result for SHA-256 96bddca065396205…

MALICIOUS

PDF

88.9 KB Created: 2021-09-19 07:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6a2dc48e61521094cd7595b8aa3cd569 SHA-1: 91c5792fca55fddeb906a5eec196df108359f255 SHA-256: 96bddca065396205559c86200e6eaa167645e8cb63482bd1b729af12861bf611
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or are part of link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing lures or directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://philabc.ru/uplcv?utm_term=k9+mail+android+syncing+disabled PDF link annotation
    • http://mabifitness.it/userfiles/files/lixinakug.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/8b63c3b43f46bf65a0835eca67ea8e5f/1701650669.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/68868671822.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd420bceac---20741080909.pdfIn PDF document text
    • http://fulns.com/uploadfile/fckedit/file/1631473191svMY.pdfIn PDF document text
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/reveduvowizumogupalunep.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/najarujup.pdfIn PDF document text
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/42627209182.pdfIn PDF document text
    • https://waxparadise.pl/userfiles/file/47267824327.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/wirewuvufabiziworu.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/66554209491.pdfIn PDF document text
    • http://ildongwire.com/userfiles/file/73361158670.pdfIn PDF document text
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/komuxuboxegufuwiloj.pdfIn PDF document text
    • http://twtime.com/uploads/files/202109162018433885.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613f9feb859bd---87373017345.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/c54cd493455ae9ee1f0e9b3a2932b0d0/midavulafekunikexubegi.pdfIn PDF document text
    • https://manage3.realtourvision.com/rtv/ckfinder/userfiles/images/files/13676060427.pdfIn PDF document text
    • http://needychild.org/ckfinder/userfiles/files/vodelikawozuzugubug.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/lasunerabodekovetaxuge.pdfIn PDF document text
    • https://www.cifphosteleriayturismo.es/ckfinder/userfiles/files/denulefujopomoj.pdfIn PDF document text
    • http://cloverdiamond.com/file/vuwinirasewupuzuzivi.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16136c583af44a---39190656862.pdfIn PDF document text
    • http://gibisch.com/files/files/80955502244.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/8st33s8lo2b69pqs70l8rnaetg/vebevexuzidizaxu.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_off0000f4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D7 11028 bytes
SHA-256: 777f2591fee5b6350df0069fd00a966aa6128c1de4245553ca0e318ce373649f
font_01_sfnt_off00010e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E48 17984 bytes
SHA-256: 476939bdca67ded4ffbb02bec1174c2ea7e9dce68c2d36a8d6e6351d3626ddbb
font_02_sfnt_off00013c34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1