Malicious PDF — malware analysis report

Static analysis result for SHA-256 306fb2c01e4a3437…

MALICIOUS

PDF

87.7 KB Created: 2021-07-21 01:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fb5529a683cdc678f9eda6bd21171ece SHA-1: b39672c33565600edf734ed6c5e8111e7111cd51 SHA-256: 306fb2c01e4a34371baaf3dce69f76ae149dd142ecfbeb15d78e7b04dadb93c2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/a80e7966bb0f5beaf9206cd26c02a082/43030662476.pdf In PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/5c725f28bc49cf24dbadf08fcd722c2f/9544501155.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/bepaxilofuvoton.pdfIn PDF document text
    • http://rayanchem.com/d/files/zegedilewaxunuzuves.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091ec2825678---bawopagidigesuvuz.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/funuki.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a02f08beefd---gexixavanarinifowaxaje.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/4fuc2k25cbdumd9ebofobr32m6/jijakop.pdfIn PDF document text
    • http://www.nagsa.es/ckfinder/userfiles/files/4825644406.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2189341e54---vekiduxasufimaxudawoka.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/47633198dd0efc5cafb771c65143ebd7/zulolovatijoxugi.pdfIn PDF document text
    • http://yousefmaktabi.com/ckfinder/userfiles/files/metuku.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/80505977361.pdfIn PDF document text
    • https://fotofidelity.cz/userfiles/file/dofufewukanil.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/f262bb6f66b64c2571736aed336d4c06/82419209911.pdfIn PDF document text
    • https://upchealth.net/wp-content/plugins/super-forms/uploads/php/files/3dfd6164e0945930ec2172bb8f4d3214/88321831568.pdfIn PDF document text
    • http://rolfingnaples.com/clients/a/a5/a5422f62036d2d393d866963e902351c/File/wotutewi.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/wifuzul.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608183d4dd121---zexodidejegifodamepi.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/8006eaee7b9756143734a7986ee11768/4184592505.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de91e4d1a3---vifuxerofamux.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/mmvueiv4npcpgqljpdgmquo77f/51105771691.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b29d5972e0f---50258826998.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=coupling+and+bypass+capacitorsPDF 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_off0000f22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22B 10944 bytes
SHA-256: bf96b7adbf6f559af670725f595b51e8ef3c8ddd2a4d5c9fdc9ea394cac84f03
font_01_sfnt_off00010b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001235b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1235B 17756 bytes
SHA-256: 6f5527f6a099237bc136142bdee633df5a53d3381b23643681be97415f49c432

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