Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b896d89ddbe5725…

MALICIOUS

PDF

84.6 KB Created: 2021-07-09 12:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 5fab87c9433fe240770228b594bf488d SHA-1: 9ccd2962f6709e1ef50a52ee4b686bcb83922aec SHA-256: 9b896d89ddbe5725ab30019f6d12c07368f021673cd5b4fe706efcd0241dd9e7
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution campaign. The heuristics indicate it functions as a link farm, directing users to potentially harmful content hosted on various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://childhood-matters.com/clients/49507/File/65038229750.pdf In PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b61143bf485---bobebodujeboxuwix.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2be9efd8a---potozakuloji.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/53797661964.pdfIn PDF document text
    • http://esebtekstil.com/resimler/files/71146404044.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/77124575767.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/r1ccmqqia3enl7l16mof08hfmj/99713109196.pdfIn PDF document text
    • http://amsaneeraus.fi/userfiles/files/21380467744.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/42582462061.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/0e6face6bd920641b25e90718eb83e3c/nolonuge.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/3a61f623e633cdbcca70b4428bc34286/4912232500.pdfIn PDF document text
    • http://kaies.cn/upfiles/210701144653819042kp8r37.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/vafesep.pdfIn PDF document text
    • http://cheumst.com/upload/fckeditor/file/fuzubugeximulinuwifef.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/53911914690.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/bb53a564b7c483bc648fc53b3648ff28/86399998538.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/83633525566.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/b9c703579d8e4f59b1bf2a4a95e885bb/salorumukuxasejatomawa.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/77045515195.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/19997128894.pdfIn PDF document text
    • http://indagosrl.it/userfiles/files/givitedoxiwibasej.pdfIn PDF document text
    • http://esthebel.de/userfiles/file/56728903877.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/v8gc1pramnfvf106u5h89vqdcd/40843347451.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/732a5dbde64d647a7c50ac97af84eea4/32483159496.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a02e21bf2e---nakenelamuzebazumokinat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=environmental+management+systemPDF 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_off0000e85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85E 10616 bytes
SHA-256: 615ef91870b9cb91ed2704a5cc619451c8065a2df25935c483d7e462fa240707
font_01_sfnt_off000100a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A4 16572 bytes
SHA-256: 044f15e9ddfefbe97ab2f31ffeb90610acac0656af60f905075b17db927f5b8a
font_02_sfnt_off00012b9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1