Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a14b4fb466df093…

MALICIOUS

PDF

76.8 KB Created: 2021-10-01 06:20:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: ebe7ab33493787e2435a227e0dabb000 SHA-1: 2925d5e98c8c9e2ed3020d82e22bad4b31b7b4c4 SHA-256: 8a14b4fb466df09306160abe8c336e77023b6d6c06f31615d0bf3a32e4c06df3
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links to compromised or disposable hosting sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection profile strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://webcertain.net/contentupload/fckeditorUploads/organization_/file/lugobil.pdf In PDF document text
    • http://yacpa.org/yacpafiles/file/tofuvon.pdfIn PDF document text
    • http://bangiyaparishadtoronto.ca/bpt/editor/uploadfiles/48608648626.pdfIn PDF document text
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/797656200.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/75423904624.pdfIn PDF document text
    • https://dichvuhappyhouse.com/upload/files/76055785268.pdfIn PDF document text
    • http://indigobaby.eu/upload/files/ravaxegoruzajudibapul.pdfIn PDF document text
    • http://dxqzx.com/ckfinder/userfiles/files/20210928_102303.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/161336d7064983---32575634135.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad5b44e196---tanirabunisigidowob.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/firagemabuwisuralujin.pdfIn PDF document text
    • http://arredamenticucinesiciliane.it/userfiles/files/88545013606.pdfIn PDF document text
    • https://plewmal-d.com/Uploads/files/jiguveguzuvepopevejuzadab.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143c75631b4e---84006673292.pdfIn PDF document text
    • http://greenearthgardens.org/userfiles/nomadizofi.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/161460a2d7c3af---81834946477.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161396f704d8ef---fizodurukapasijusuk.pdfIn PDF document text
    • http://axi-hohenstein.de/userfiles/file/66821696750.pdfIn PDF document text
    • http://quangphong.vn/uploads/image/files/gabeperamiduwetogobifojoz.pdfIn PDF document text
    • https://www.psk.com.au/application/third_party/ckfinder/userfiles/files/10129461908.pdfIn PDF document text
    • https://silverbirdmarketing.com/pages/images/file/napuborapa.pdfIn PDF document text
    • http://customize.fr/fckeditor/editor/filemanager/connectors/php/img/Editor/file/54631129286.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=vidmate+iphone+version+downloadPDF 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_off0000c45c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC45C 10780 bytes
SHA-256: 3558708d1174190228a298613f51672df4be88bc17905569723b2f5b98f8bfd3
font_01_sfnt_off0000dd07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF519 18660 bytes
SHA-256: f5a5830718411b865a969a0eb9624629c5765deddfea3845cc5f27de4b712fad

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