Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ceabeac2f4588a7…

MALICIOUS

PDF

77.7 KB Created: 2021-09-03 00:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 70d1864acb1ad65aa1c89a509daec024 SHA-1: 6e2e66a2a5aa0f95cd28e5e224070f4ad9424a6f SHA-256: 2ceabeac2f4588a7ea4652658eb0ab025a4964d6d272bc4b91a471f1ba8f5c3f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection for phishing. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and link farm indicators strongly points towards a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://iberia-ex.com/images/blog//file/57766175680.pdf In PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609610901a4c5---dududejawuketifetidut.pdfIn PDF document text
    • http://onlinemidias.com/ckfinder/userfiles/files/xuzenuvi.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/17020859253.pdfIn PDF document text
    • https://www.ksmt.edu.np/assets/ckfinder/userfiles/files/34947446484.pdfIn PDF document text
    • https://decoveinvestment.com/userfiles/file/4057512707.pdfIn PDF document text
    • https://lemanssrl.it/file/95319708442.pdfIn PDF document text
    • https://laatjehuisweerstralen.nl/upload/file/takedosuvukoke.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/jedifavulemoseviginugu.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/dvncpnm32j64lue76ug2p3uv34/77936084356.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/mugop.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/81345798169.pdfIn PDF document text
    • http://www.ipkameralari24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1888352a74---86578158111.pdfIn PDF document text
    • http://fsgpj.com/upfolder/e/files/20210717085054.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210703_A90A38E474CF5EFF.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608191b23ceaa---74367083467.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610c3cf523358---siduvisodejomufanumivi.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/gijujefedasafajuzu.pdfIn PDF document text
    • http://agama-rc.com/upload/files/nemekowawazo.pdfIn PDF document text
    • http://hhs63.org/clients/8/88/88ec95b665b56da82b1de85f097fba10/File/51546047872.pdfIn PDF document text
    • http://offerseir.com/basefile/offerseircom/files/5181951713.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b76ce6b07f8---55599505442.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/a19942ec82c4d5301ee3da4d717521ac/zipoleb.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/a8b1a5253986e301f045bc7cc514a1d5/sizipowazufepaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=phd+application+proposal+sample+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_off0000cbb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C4 17152 bytes
SHA-256: 82cbaf039dc95f9daa37e1b435ffbbafc119f926e3aa0a6270a7467ca879dfa1
font_02_sfnt_off00011051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11051 10888 bytes
SHA-256: 70c2c79ab140f31055fefb01ad6155b74f8ecb4b762a3428cf3c99dff6d58b1d

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