Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8e39c6ef12deabc…

MALICIOUS

PDF

72.9 KB Created: 2021-09-19 01:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: afbce643b2aede7990853f7ccbcd4235 SHA-1: 12b16d8944becd48fdeb65fef4f489b0f540d19e SHA-256: e8e39c6ef12deabc4ac5088563d35c321dfb1b8b350f491147322f0be2afb93d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were directly extracted, the PDF structure and heuristic firings indicate a phishing or malware distribution attempt.

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://ks-system.co.uk/ckfinder/userfiles/files/93509601123.pdf In PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161403485e874e---51239611029.pdfIn PDF document text
    • http://reflita.lt/uploads/files/lusivodomabupozo.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/59236385853.pdfIn PDF document text
    • http://recuva.kr/upload/fck_img/1630624037/file/kogobogoxunefebasubanif.pdfIn PDF document text
    • http://jinsonmetal.com/Upload/file/puporasaradejanaxurolona.pdfIn PDF document text
    • http://we2meeting.com/ckfinder/userfiles/publics/files/vulojamebumapu.pdfIn PDF document text
    • http://ducnhua.com/upload/files/44332875163.pdfIn PDF document text
    • https://demo.wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/jinozipinumavefatopufise.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a7e0a4714d---594396516.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/fekagewonavufipexuwavezi.pdfIn PDF document text
    • http://castel.lu/userfiles/files/mixavejolelowo.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613364e218524---79019779015.pdfIn PDF document text
    • http://roberthalasz.eu/uploads/file/63796011117.pdfIn PDF document text
    • http://euromarkcreations.com/new/fck_img/file/wugajab.pdfIn PDF document text
    • http://travellerisland.com/files/16058147425.pdfIn PDF document text
    • http://mrtowing.ca/Lawyers/userfiles/file/40295430999.pdfIn PDF document text
    • https://agregadoschucuri.sinecsas.com/ckfinder/userfiles/files/23876771281.pdfIn PDF document text
    • http://foxgraphics.paulsfashion.in/files/poretineketewigeb.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/16561171956.pdfIn PDF document text
    • https://alirezamirmohammadi.com/images/upload/files/22612668812.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name/files/lazomazamasavi.pdfIn PDF document text
    • http://studioaeditecne.it/userfiles/file/vemewanetukevome.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=kgf+tamil+movie+download+isaiminiPDF link annotation
    • http://s250801404.onlinehome.fr/img/uploaded/file/dubisowepuzurazawopupedo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4C5 10740 bytes
SHA-256: 0333fc42c1bee9dfb91ddd4a7698bbcbff6deec145b9b9994f83780efe3c0d90
font_01_sfnt_off0000cd4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD4F 18752 bytes
SHA-256: cd69f8a3a815f948197534bb9a87427f16732f6fabc3380879d911213769d04e
font_02_sfnt_off0000fe3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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