Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ab0f2f48568f498…

MALICIOUS

PDF

94.5 KB Created: 2021-09-07 19:38:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 90ee55e3a8fc16aa1227898e284956b2 SHA-1: b1ec2d3b40190954f96061c4a99b526627afb517 SHA-256: 9ab0f2f48568f498bc0dd579d9d0dd04f8df48410a6c7cf40f276a61cda95d17
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection as a phishing trojan. The document contains numerous embedded URLs pointing to various domains, many of which appear to be part of link farms or compromised upload storage. These URLs likely serve as lures to phishing sites or downloaders for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://drafthe.ru/uplcv?utm_term=abdominal+workout+pdf PDF link annotation
    • http://cnex.cc/images/blog//file/58967601025.pdfIn PDF document text
    • http://oshcongregation.com/userfiles/file/keresizafidagidogi.pdfIn PDF document text
    • http://bigdoughpizza.com/uploads/files/10162869154.pdfIn PDF document text
    • http://medwin.kr/userData/board/file/14034610189.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109316967077---zoxezodekabaginef.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/jijavojesikatuvuxiwogud.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa07c178670---xelowazizififisupifakoti.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/893448f27f1cbee4f35a3701c6e00fb1/56322887259.pdfIn PDF document text
    • https://europawindow.com/app/webroot/img/main_content/files/53892375180.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/66868957682.pdfIn PDF document text
    • https://securityguardsupply.net/php/uploads/file/9705079226.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/kifibaziro.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609867ed11f88---42183553605.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160dae10bdf77d---tubakub.pdfIn PDF document text
    • https://thingstodobahrain.net/ckfinder/userfiles/files/jewenufam.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113057b2f7d3---36681761781.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/bb98f4231e1d4da953e49e00e25eb0ea/69209549924.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ee8a3c2b6ba---vajituvadiwebotibaremowos.pdfIn PDF document text
    • http://gemmacapitalgroup.com/foto/file/55496400537.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c569468dd7f---8797175045.pdfIn PDF document text
    • http://haohanlegend.com/Uploadfiles/files/lemirenuk.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/bae293ea0159f0ad8f692721010a5030/36030053644.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b821b4ae9d9---68605295014.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c59e248adc3---23271303931.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/fewobajeno.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_off00010c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000124a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A9 17988 bytes
SHA-256: 6de34d8ddd4de206b92096128b4afa06b9be18c2c0e6da2f641a192e3a059c4d
font_02_sfnt_off00015384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15384 10760 bytes
SHA-256: cb0b09ec8c19a9a038a478facc59217e0a4fa652f378dbc25f83ab0e5a088ab8

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