Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ea74e73122b6ec7…

MALICIOUS

PDF

94.1 KB Created: 2021-06-27 22:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 972d0d241ef6fc77d1e39898c5001a27 SHA-1: a62bce364c9155d12f08be520f008200eb1687a3 SHA-256: 3ea74e73122b6ec74e620c63f51a5babc4a48774b607ed0791679acbac7d00e6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://irlanc.ru/uplcv?utm_term=what+can+blue+tongue+skinks+eat
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/f0c18adb4dc6fd89a892ad3821a270ed/ravavegof.pdf
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/3cr9v1uqdidglm58jsbeim82g2/woderumasada.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/ba2671d722b0910a48185ecd1c451a97/567048730.pdf
    • https://pima-alarms.rs/slicice/file/ligepiwobovuf.pdf
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/fcpbumba3keg7vglok2du46q53/dikipowizebegupejitimixas.pdf
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c75bb0dbb2f---devatated.pdf
    • https://tavio.ru/files/file/dogokitituxutud.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/a7b4ed6b098da7b9bc6af7d266167387/80741211462.pdf
    • http://thedewakohchang.com/image/upload/File/ipinokefa.pdf
    • http://kirilmazbardak.com/userfiles/file/90880700052.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bd0aa5c29---xegudukanilumu.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607043cc32dec---furakovigori.pdf
    • http://botosani.ro/img/uploads/file/vokezunumojapivojeduk.pdf
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/cba94bf9406f0e3a4d21d8e8f03db086/42773490873.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bbc6f0c0c---dederawi.pdf
    • https://szud94.hu/img/sajatfile/files/78102118385.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/233364d90c0d2e6aa3004f51aedd904f/28787502117.pdf
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/dou45f4smhvi0bvb1rieh2hrf9/laxizefemigulirepu.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607a00af74a8d---mujegowugelubopojojub.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095b88108a43---wakokilokakuluzoruf.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d63b5de27---gapeke.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/e332b8eea5629d86cad2299884f4ade5/80836636605.pdf
    • http://fixafilm.se/userfiles/file/23746935553.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010cda.bin
e031f9c6e644e353c2a3a73bbfe73ff61231d440e177270fd2ceab79c01a16ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDA 17480 bytes
font_01_sfnt_off00013a76.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A76 16792 bytes
font_02_sfnt_off0001528d.bin
b9435491e62fd8bc18b7c171e4884c97ec7c89b11bc23412f52e03ffc9e1a586
pdf-font-stream PDF embedded font (sfnt) at offset 0x1528D 10732 bytes