Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0a2939dbb3dee7a…

MALICIOUS

PDF

94.5 KB Created: 2021-06-26 02:38:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 774d3e7907bf19b5c77b786b35293d07 SHA-1: 13080aefb40560180f83f74d7018c906690282f5 SHA-256: d0a2939dbb3dee7a6ada86b94ff66ee9211608e91989bea60175854fdb2f609d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other disposable hosting. These links are likely intended to redirect users to malicious websites for phishing or malware downloads.

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://crysiq.ru/uplcv?utm_term=the+selection+series+in+order+to+read
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1608c05b46dd95---pomoxemu.pdf
    • http://dlevitin.ru/fck_editor_files/files/vunepimegadumofadonajap.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bc392a20d5d---libereza.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c73f5affdd---guzetokegitufuvasejudud.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/3d19eb8444bf2a7ace8a65200bb22c4e/saxevugojegovokuf.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/25751ebf62c5e898fbfa13d18b6dfa38/vosereg.pdf
    • https://people11people.gr/uploads/File/78888929993.pdf
    • https://tvmreza.tv/ckfinder/userfiles/files/37573305256.pdf
    • http://www.dereformasenalicante.com/archivos/files/22888741027.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/15121118938.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/d5b4f6ee357e3eb23cc4832d8a8db45e/32369113845.pdf
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078c5736b6a3---81750772592.pdf
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/d7706fa86b5d3f4ed3e611508c2ab650/92268162435.pdf
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/989c54383f63d10b1dc0e5152eea3593/28569233723.pdf
    • https://fnb-concepts.com/images/uploads/files/jekelezax.pdf
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/iveskcq8qte9fko1p4pttpsm39/gevodamaraziziwuxalidumo.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b24d101b014---9110671002.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160c089f1931c8---konutuvujip.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609a666fec88a---2402962142.pdf
    • https://taechoclub.com/FileData/ckfinder/files/20210626_03380A2326863F53.pdf
    • http://unseenadventure.com/userfiles/file/nilamuririwagimijujew.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b876e1b479---44313290276.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b6eb206ec9f---94084291422.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_off00010f5a.bin
9598582f900000411aa8d892f84c1d2b43f95e5499ed75d7fe8d842c0cd46d40
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5A 17480 bytes
font_01_sfnt_off00013cef.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CEF 16792 bytes
font_02_sfnt_off00015506.bin
276408b2976ad846d06333e7d193cdb50f44a9806e5e3039b8a18ec69fc04087
pdf-font-stream PDF embedded font (sfnt) at offset 0x15506 10428 bytes