Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ebed0a35671027a…

MALICIOUS

PDF

72.8 KB Created: 2021-09-26 19:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 596665d88ae872c7a9b69d1386513eed SHA-1: 4b554dd8fce37cb07ed286f9441b4233afb435e3 SHA-256: 6ebed0a35671027ab3a621be042db83a69171791ab53f23eda444c9c645b1b6e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a large number of external URLs, many of which are hosted on disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=popping+ads+on+android PDF link annotation
    • https://jck.ro/userfiles/file/dolopefapadusodozofi.pdfIn PDF document text
    • http://aviapartner.biz/js/ckfinder/userfiles/files/92878849677.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/lonotudiziresigefe.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/39590877762.pdfIn PDF document text
    • http://mijinmotor.com/fckeditor/userfiles/file/90901958294.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/mofedojuvolalopi.pdfIn PDF document text
    • http://taociren.com/upload/file/210910181457695376p02yv1d7i9rv.pdfIn PDF document text
    • http://ues-rb.ru/themes/ues-rb.ru/files/dizemutuze.pdfIn PDF document text
    • http://udelimpa.es/ckfinder/userfiles/files/dibizafib.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog/file/58473983864.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/3bae34afec5edb42e48db530f3b26ef5/61021048800.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/35192644988.pdfIn PDF document text
    • http://xn--hy1bt45apoap01a.net/jangheung/userfiles/file/ruxubapoxabaz.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/51085959443.pdfIn PDF document text
    • http://phatnang.com/media/ftp/file/70959300043.pdfIn PDF document text
    • http://eyupsifalibitkiler.com/resimler/files/punamigovuxabutebizisevi.pdfIn PDF document text
    • http://sbkf.org/files/files/18751460517.pdfIn PDF document text
    • http://appartementslisa.it/an3_Uploads/file/zabirepanut.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161363d041fb3c---38840809053.pdfIn PDF document text
    • http://obkladacstvikolar.com/content/sinufuxizujonivajesekab.pdfIn PDF document text
    • http://kayapalinakliyat.com/file/zewabakiru.pdfIn PDF document text
    • http://fatfailogistics.com/fckeditor/files/file/zidasawon.pdfIn PDF document text
    • https://ykitraders.com/UserFiles/file/29820055863.pdfIn PDF document text
    • https://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/lajasawudufiveseludebep.pdfIn PDF document text
    • http://moscowballet.ru/userfiles/file/6349019708.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/masikavojofivikoze.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_off0000b8fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8FD 17644 bytes
SHA-256: 74650ec56f0ee9e7a5ad8adeb3f8a654aceb898f35002218e446b7957498b442
font_01_sfnt_off0000e68a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68A 10292 bytes
SHA-256: 9ab583d7b1ad14ca9a1402f8ff0ef826bba822439326a855d731240836e9fe93
font_02_sfnt_off0000fd93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1