Malicious PDF — malware analysis report

Static analysis result for SHA-256 0204abd256ad85e7…

MALICIOUS

PDF

86.9 KB Created: 2021-09-01 09:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: da939645c5ba95b9ec4cd6d7f689f8b9 SHA-1: 358e8c2cb4ecd90f98446e29d0e3dc6c608efb40 SHA-256: 0204abd256ad85e750643a13e42f903120c50a354b098dd0cc418896b7187219
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites acting as a link farm. These farms redirect to other PDF files hosted on various domains, indicating a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/ehoth21ldeoumface62oij00is/bitodakedogabuneresugu.pdf In PDF document text
    • https://rinducm1.com/contents/files/goporeza.pdfIn PDF document text
    • https://leavingcare3plus.ch/userfiles/files/banetitajejepozoxoditefud.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/arobdppb28tf25vr70a0v9nu41/53811874490.pdfIn PDF document text
    • http://kythuatviet.vn/uploads/userfiles/file/64112758335.pdfIn PDF document text
    • https://www.kindspring.org/inc/ckfinder/userfiles/files/tiwamogewinejuvuni.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/h3it00gatj8ukeh2b09f695j61/68248030676.pdfIn PDF document text
    • http://1-champagne.com/blog_images/blog_/file/gegusajesimaletekukanite.pdfIn PDF document text
    • http://1qjd.com/upload/files/2021-07-10-03-02-44-EMkPtbQg.pdfIn PDF document text
    • https://henklinders.nl/henklinders/upload/files/17666677588.pdfIn PDF document text
    • http://nuklearmedizin-amro.de/userfiles/file/30278649039.pdfIn PDF document text
    • http://capthepcongtrinh.com/uploads/news/files/wunidabobi.pdfIn PDF document text
    • http://belst.by/upload/file/25840823955.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/39bea7572b5ec8a173864c18bd6b5486/rejakirodewirezalesasoz.pdfIn PDF document text
    • https://www.aicsmindia.org/ckfinder/userfiles/files/71057420563.pdfIn PDF document text
    • https://esprimagroup.com/userfiles/file/vowilol.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/90839191284.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/tibivikivimupusenadeluvug.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9a0823d72---tileperadulegudujedu.pdfIn PDF document text
    • http://prestizhstroycompany.ru/SITE/files/editor/file/wunorozupimarejufaza.pdfIn PDF document text
    • http://nceed.kr/pds/userfiles/files/91981403023.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/1a9c2616a474fd1e24fa7a4646469c50/vozapuv.pdfIn PDF document text
    • http://sshs1962.info/clients/3/33/33dcd814b32da85629335a95ab3d0158/File/fukaxosifavogetogi.pdfIn PDF document text
    • https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/93779291797.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/d82dd9f4e803cc62de90b048d94e4dbd/734226983.pdfIn PDF document text
    • http://veitali.com/upload/files/49180378742.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=this+is+for+the+boys+with+the+boomin+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_off0000ec88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001049f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049F 10576 bytes
SHA-256: 83371d30a9d613c7588912c2ceca3215e6ca878b3a71b232925c7bfafaed3a80
font_02_sfnt_off00011caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CAA 18792 bytes
SHA-256: 893fcb296fa7541a564f6074c7db7081ee25ef78e10a9d2b57563cd7049bc8a8