Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3cca11863ea89e3…

MALICIOUS

PDF

97.7 KB Created: 2021-09-01 18:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 04fa4ebf1ad1c8da1e0cf697c1984d08 SHA-1: 93f42ef428e18743781ae47f5c7a6d8198d3278e SHA-256: e3cca11863ea89e3c673321ce8856e574dcb16b055e6b9c8c1af882faa79d083
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to multiple compromised WordPress upload directories, a common technique for hosting phishing pages or malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16129f56d901c4---fitaburopumiz.pdf In PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f282f0986ba---80062883240.pdfIn PDF document text
    • http://arslanemlak.come/file/69777856472.pdfIn PDF document text
    • https://fulzugaskozpont.hu/files/vuxez.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/17033796199.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/zuwasozogevo.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160797d3e05f98---febanafot.pdfIn PDF document text
    • http://zangerlelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/11753160890.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608579e0b8e42---55385690800.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/vogupebobanuxurasakadizi.pdfIn PDF document text
    • https://ajansnigde.com/resimler/files/xepevoberatejenesabisoz.pdfIn PDF document text
    • http://gpshardorawal.com/hemkunt/userfiles/file/juxawovudugizedumejom.pdfIn PDF document text
    • http://ecofincas.net/ckfinder/userfiles/files/22487543367.pdfIn PDF document text
    • https://akgoz.zemta.com/uploads/files/6396864915.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16087a959ecef6---tavusazowuvisagi.pdfIn PDF document text
    • https://axlthailand.com/imagexx/files/nukinoluw.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/83051564817.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f2b539f3f17---54614440556.pdfIn PDF document text
    • http://phannhan.vn/files/usersfiles/files/30347210437.pdfIn PDF document text
    • https://rdw-wolf.de/backend/ckfinder/userfiles/files/fumepajupavetenovu.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/41264796166.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c19c076e6---kigujodasawivotaxiraxilix.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/67830163160.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/70901696256.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f6e2d8f0a3---53189055784.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=isotopes+isobars+and+isotonesPDF 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_off000115a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A3 10432 bytes
SHA-256: 1db73f3dfe07d3dfd1bb50833ab0c2acfbac99d319f670893a6006b28fe62ac0
font_01_sfnt_off00012d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14543 19672 bytes
SHA-256: 29e300354b71e46d94ec50180638cb4b200720f77fbd8f89863edd1c3d8ce033

Open this report in the interactive analyzer, or submit your own file for analysis.