Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47b61d8a711676d…

MALICIOUS

PDF

81.2 KB Created: 2021-09-05 15:35:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 81699196a131230399b2ca46bfb21780 SHA-1: 216f89388b67c2ee0ba3adcf1bd13a2ddc4181dc SHA-256: e47b61d8a711676d96741013d31b1459497c22748507c5bcbd504c8a2787f765
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable or compromised hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • 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.
  • 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://delaneyllc.cfonewsletter.com/ckfinder/userfiles/files/xeputigovevime.pdf In PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/122e43becf5f1da651e70d421ae43188/laxosunaniwekewarux.pdfIn PDF document text
    • http://plafondchauffant.fr/img/user/file/37714328857.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/wasisadovebewanoma.pdfIn PDF document text
    • https://xn--bankkrtya-41a.hu/js/ckfinder/userfiles/files/12326882144.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087b6b7bf518---71426833346.pdfIn PDF document text
    • http://celyroknaterase.sk/editor_uploads/system/files/buxaxekixopogatafega.pdfIn PDF document text
    • https://onecre.com/images/content/files/sefubawamususali.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608402b4e4cd9---petavaxokil.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/fowegudajubivi.pdfIn PDF document text
    • https://magicdiscoradio.hu/userfiles/file/12126362578.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af883aadf7a---fubabikukijitogiladi.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/obd1kshcdetetodnn1vf76dspj/lezipefefazulal.pdfIn PDF document text
    • https://sgcaregiver.org/contents/files/kuwivotidokefupadosemo.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/a27ctvdedvg5q4d5oq73k3nkm9/lubuxotovuj.pdfIn PDF document text
    • http://muslimofwestbengal.com/mwb/editor_upload/files/39504444314.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/gavuninifi.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160812377b1f9d---35052424228.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d75351892a9---51187098496.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cc059ee3f7b---nubuwevuwawiwabegukav.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/0c2012f16b16cb6c8f6108ff154997ec/kanibozakidigoseleka.pdfIn PDF document text
    • http://thenext.pk/userfiles/files/12313444096.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=shiva+meluha+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_off0000dc04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC04 17164 bytes
SHA-256: b9d38681d688337ab16e90ac925608d48af2309a81d845fac33dca8e6a87ddee
font_01_sfnt_off0001080f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080F 10416 bytes
SHA-256: 372d954b48423ac87539949e39f725e61dbee7891d32f77beab8140969a4c279
font_02_sfnt_off00011fa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1