Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0cc3b6bf5595c30…

MALICIOUS

PDF

126.2 KB Created: 2021-10-11 08:29:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 14f726f9a0a73052a5ec632c982f9a47 SHA-1: 641e3870d25933cab62398d91c091720b5fc7a89 SHA-256: d0cc3b6bf5595c30fb16c629ecc03899de9fa7b543908bb26bd56bc169f8d295
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point to a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161537ee89fa8d---1742818622.pdf In PDF document text
    • https://helicopterleasingservices.com/userfiles/files/poxasagadop.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16144ccb0431f1---59549831190.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/161608c4c0a455---70096527078.pdfIn PDF document text
    • https://aspit.ro/imagini_ws/53073625558.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/kikobidovawegaropuj.pdfIn PDF document text
    • http://seyrimerdin.com/userfiles/file/26440065025.pdfIn PDF document text
    • http://egitara.com/upfiles/files/45302498300.pdfIn PDF document text
    • http://gestaocipa.com/public_html/Imagens/file/86796533194.pdfIn PDF document text
    • https://maryamghiasi.com/images/upload/files/fabibaxexigenifa.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/paxujapokuberuzoteruwude.pdfIn PDF document text
    • https://pitbulllocksmith.com/nbloom/fckuploads/file/41437654106.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1631060703.pdfIn PDF document text
    • https://anhhuynoithat.com/asset/files/83031515456.pdfIn PDF document text
    • https://affordans.com/ckfinder/userfiles/files/migenibov.pdfIn PDF document text
    • http://slkuang.com/v15/Upload/file/20219434599683.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/tirufibobuw.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/95375698629.pdfIn PDF document text
    • https://gruppopolidori.com/upload/image/file/3376013695.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/rugepupola.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/3kk2do717ij7e7v64hh91p8v06/41543714380.pdfIn PDF document text
    • http://www.saito-ken.jp/userdata/file/bojexitiw.pdfIn PDF document text
    • http://keemunblacktea.cn/uploads/file/100143597429.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=meaning+of+maslowPDF 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_off00018378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18378 21296 bytes
SHA-256: a5b750000265ec4a9a136683b442e1aee50cdf7b59c75840380ad459afd40d83
font_01_sfnt_off0001bb29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001d340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D340 10440 bytes
SHA-256: cdde7c4d9bfe230a3dca6bdc2f399003b48bf9590af3abdbda3cddf5a9c09b7e