Malicious PDF — malware analysis report

Static analysis result for SHA-256 46f912d2bb00adc6…

MALICIOUS

PDF

98.7 KB Created: 2021-09-04 16:52:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0d02d8523000320a494e72fa6536ac95 SHA-1: 7d539e95423e3b05a919e88cbaaed0406e64ff98 SHA-256: 46f912d2bb00adc6dca65090107e8be284b8dc5d912d46760139f3aafb1cdd04
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the structure and URL patterns are consistent with a link farm designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

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://krisoc.ru/uplcv?utm_term=types+of+polarization+of+electromagnetic+waves+pdf PDF link annotation
    • https://photojet.bg/userfiles/file/tilinoruzewufi.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a605d0b45eb---88560626634.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-6-26/20210626121509399120.pdfIn PDF document text
    • http://zoekidsworld.com/userfiles/file/7009381347.pdfIn PDF document text
    • http://cnpair.com/userfiles/file/wenixarirud.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16071da0ef33ad---mimudijilared.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8b1ed5019---tuwokowazapomigav.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b262b978b77---volalimoma.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/lenovedosotanuripa.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5f7de369b---46400547167.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/02c51aec29c0343f40d95f4eef13cdd2/dasinekelelivekid.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea49d2c3a0---59002341849.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16119a86d5d067---96817491429.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/7krjsenar01csu17ivfbs1i5l4/79923883740.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3f77a4a5dd---woxenif.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/54753975058.pdfIn PDF document text
    • http://delfosventures.net/userfiles/files/2177424494.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eec46bf709---59690771947.pdfIn PDF document text
    • https://tyko.pl/userfiles/file/tisisabumodul.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/6d8362429d8dd1f505c364134a7caabe/fusifin.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/09jr5j9h0r6spsbhdle8pdehr3/19504115689.pdfIn PDF document text
    • http://restauraceeverest.cz/userfiles/file/sidapemerilakubajejozagu.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/44551785806.pdfIn PDF document text
    • http://schubert-hh.de/image/file/savuga.pdfIn PDF document text
    • https://irrisyst.eu/files/file/leriwezobolumijebi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000141ba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x141BA 19288 bytes
SHA-256: 8d2d551ecb8e0188822c5036e6ec525875f97e3aecd155e82c17ba310b213ab0
font_00_sfnt_off0000f8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E5 18864 bytes
SHA-256: b6287faa1ac08bc6521e6f82e71bdd10d3763e9b92272c9caddb2d723ab48688
font_01_sfnt_off000129a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001618a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1618A 11252 bytes
SHA-256: bf538e9c9f7c1bd78bfd1d040d29b9a0156542869fad00618fc86a30d9a022d4

Open this report in the interactive analyzer, or submit your own file for analysis.