Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fab5480efb5098c…

MALICIOUS

PDF

107.9 KB Created: 2021-06-26 01:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: eb50f7f57cb5abe4abd0f82b16fa3cf7 SHA-1: 00b6ffd2a62b4caa6a1d1b0188292ffe7950dea3 SHA-256: 9fab5480efb5098ca54a7882017624f64ee55f3e81195a30b9e8dca6424406e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that likely lead to malicious content or further infection vectors. The presence of external URIs and compromised CMS upload links suggests an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9746

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://medvor.ru/uplcv?utm_term=youve+got+friend+in+me PDF link annotation
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/8t3vfdbqi0alh7ugolkragt63l/5795103899.pdfIn PDF document text
    • https://wsbtitan.com/images/file/gokizutijetegiwi.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a3031234246---xogedabiwejis.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/e0829b24ebec3b5b76ccd6fc70445169/99252055846.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076fb3354ba2---sowufigises.pdfIn PDF document text
    • http://drive4smilesontario.ca/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/59263522595.pdfIn PDF document text
    • http://leebyunghun.org/new/upload/board/files/tilikap.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c28e07a09bf---12659179103.pdfIn PDF document text
    • http://chinocorporatechallenge.com/clients/6216/File/43744646118.pdfIn PDF document text
    • https://nonbodepsg.com/uploads/files/61823555283.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/83c591b2d1322d94e0573826bb087d40/22393652114.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/83ca32533d5de1f54aa3320c62f22689/xapenokejefemajusubobim.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/78491679095.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d868dea0e---65768793585.pdfIn PDF document text
    • https://ocw.tw/uploads/files/pafubodid.pdfIn PDF document text
    • https://mayurherbal.com/userfiles/file/823169528.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/kopibodumugopisuzedefa.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d85d74af31---kixab.pdfIn PDF document text
    • http://greenhousehotel.vn/uploads/image/files/sexelulejuwujobofakike.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607984eb9187d---87315293430.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/23324292023.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16074d1ddaf02f---15417741293.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/97136258397d58972c96ec1a8198e559/12417688308.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD7 26640 bytes
SHA-256: 91495d752974f9f79e536502e31e5eb4811c037c7bceb0bd68a27e8b36bcbb54
font_01_sfnt_off00013c43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C43 5364 bytes
SHA-256: 0ab076f0141d91334be9935dfb5b95d53a7259d04d259b337c0ec70731a1aff6
font_02_sfnt_off00014fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FC2 10468 bytes
SHA-256: 97cbdd93c62738da310b8f350ff26ee73977d7963fc9fd122d09dbd69ef3e0e9
font_03_sfnt_off00016747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16747 19352 bytes
SHA-256: 403bd1145941f0e18fd75bc9e71002d9a8c211e67d677585e4c1e39d76ea3e27
font_04_sfnt_off00018810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18810 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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