Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ccc7d5aed48f8a1…

MALICIOUS

PDF

86.2 KB Created: 2021-07-03 19:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ea91b936b01ad094d193b28a10f25cb9 SHA-1: 272bc80017e8bf5ed493acb3ae88daed8bbb38a7 SHA-256: 6ccc7d5aed48f8a105f917e1537816fca2c168073da8cd9ac74cad11e8a9b0d5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's used as a lure to direct users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://wastran.ru/uplcv?utm_term=thorn+removal+from+finger PDF link annotation
    • http://ladyqueen.it/userfiles/files/41948165279.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/fisararon.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/86607930745.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6aa87a4599---kutusonekiloka.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/jaxizeguxoxuzaxagoxafi.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af99773a16a---14806717841.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab66cf55648---pipurig.pdfIn PDF document text
    • http://northphoenixmustangs66.com/clients/4/4b/4b49b54eec06ebba3741256e9f3e6f2b/File/95011201294.pdfIn PDF document text
    • http://brooklinehs1964.com/clients/6/6a/6a3559cec3eb17f551da2d864c8c85ab/File/16720367817.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/vogejuzifumugefufejo.pdfIn PDF document text
    • https://gyandeepjkss.org/userfiles/file/fabotedupiforedelebem.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/kewoxavej.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091eb54826e8---gixotiligulebugege.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcdf7e1015e---42580554200.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/53528003483.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160e085f9565a4---36908922119.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/mirakupasetizugokef.pdfIn PDF document text
    • http://aapltd.net/userfiles/file/ledotusojuxasinixofojuje.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/72342818506.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/sizivufedevipa.pdfIn PDF document text
    • http://arablift.net/userfiles/file/jidesazeguwububi.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/sijixozegu.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a207108ac2b---92064044618.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609300dceb65c---79864172856.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_off0000ecfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10514 10424 bytes
SHA-256: cdc72cae0f29d1b49f9f679c85006bb897c4bb5bb8835f597b8e0753c4fdc009
font_02_sfnt_off00011c77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C77 17516 bytes
SHA-256: 76619ba79666dc234c064d5288084f04cd56c9837d191f241e6f6ddb9688d673

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