Malicious PDF — malware analysis report

Static analysis result for SHA-256 d893ebe1114aa414…

MALICIOUS

PDF

87.1 KB Created: 2021-09-06 15:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fd333f78868915921992b38e7200686f SHA-1: eb7321fb63087fdbb8818b8def505d1df1140c4d SHA-256: d893ebe1114aa414565b46bcc708359bfaed9c8c2212c8cee3dd4f37c23567fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://archism.ru/uplcv?utm_term=ladonna+osborn+pdf PDF link annotation
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1ad32977f---57165295067.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c61cd09af73---6943407030.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a82bb087265---37648744300.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160822125ce180---rezuzododukajovinoj.pdfIn PDF document text
    • http://datong-travel.tw/upload/ckeditor/files/20210709190049.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e31627cc5---10126155087.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eed3bcf48b---27096921693.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/sh8spf0gd6d7cr8s2icg6bi45p/25309270030.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/wamubepeb.pdfIn PDF document text
    • http://xenangheli.vn/public/files/senigowopixedekezimafise.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/nuwimafukifupobimumexagov.pdfIn PDF document text
    • http://greenplanetnepal.com/userfiles/file/dufaveturez.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/nukotobejesusuguvol.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/28309197409.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/domos.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/40820318458.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/xifuwudozam.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/javaz.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608d557868839---11750028180.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/26108407956.pdfIn PDF document text
    • http://gsnursing.in/ckeditor/ckfinder/userfiles/files/rabegosuzodewedesu.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/533502af039e18d23bd2100e98e03bed/47540898699.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/pikalemuvaserezamajo.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8e224f93d---44587386823.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/wojomesuwufik.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d54d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54D 10220 bytes
SHA-256: be469e350e33bd3c84b272eb60d8820e5261e3432870c696fc9867b5a10ab1e4
font_01_sfnt_off0000ec0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001041b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041B 16180 bytes
SHA-256: c0217721a1102ad1f8a8ff5461faadb02f26a3634bfe128d67f68b25b112ee8f
font_03_sfnt_off000119c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C0 21268 bytes
SHA-256: 37894477733280d98b109a43fc0472624a9cad53e97dbbd75c4cf9d4335ff980

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