Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcda6a29832b8221…

MALICIOUS

PDF

82.7 KB Created: 2021-09-01 17:01:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 62144acba64480240ba516035e096080 SHA-1: a35cc2a048d5328723d833df4190c3cffbab4939 SHA-256: fcda6a29832b8221c554e58ec1564e5d93cee6a4e8ebad8d1b3ceb0ff17e400c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm with numerous URLs pointing to potentially compromised websites, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farm characteristics indicates a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://krisoc.ru/uplcv?utm_term=documentary+film+production+pdf PDF link annotation
    • https://airflow-skateboards.com/upload/file/xinifumolulibunoririle.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/jufabiwetekitin.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/d5sbmkncnhqeg64a58tpvcvrk8/wegajemezebikolovutu.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad570836ab0---94269146753.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/99460922566.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b4891741e8e---votomigozeselulodegodajid.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/3190ca4c13109cf85f3724d6e81cea47/bikifugunadotarirefopop.pdfIn PDF document text
    • http://appletechsolutions.com/userfiles/file/xajejinubasisajibugiba.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/72518010657.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078793e007b5---1595946585.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/f47d9378a5de34556748f7950a66428a/71565475082.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/doxofulavuwesod.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/f5daed74a6f7f32076f82abe06a32ced/27420310472.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/14786584608.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c513d9626---zufitukodonizuxuwogub.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/bqldie6170tn97ob8i52mur89q/77221073943.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/56862934821.pdfIn PDF document text
    • http://dsraxys.com/uploads/rivojifumotonofeg.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/puvabanojexose.pdfIn PDF document text
    • https://luckyfood.itweald.com/uploads/files/612c6a4aa443e.pdfIn PDF document text
    • https://actaviaserica.org/board/file/files/48630427806.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b120d5bad69---42049650802.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/remopov.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_off0000dcdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDD 17588 bytes
SHA-256: 6bcbc6802092475c96b35eb784ea0165d5044942929fa6dc30499bef2ead12c7
font_01_sfnt_off00010abb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D2 10828 bytes
SHA-256: 3f38cc7d19014f4225a0807325475fe545cf5217ec9ba0450ee03d8656fd6ce7

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