Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd49a10fd101616…

MALICIOUS

PDF

87.9 KB Created: 2021-09-19 03:59:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 509bf5b7b8909117ffbbdbaae954fdc7 SHA-1: 49e4a0c8aa311c867ae406cfbab1fbd0b8911ca7 SHA-256: dfd49a10fd101616d1b5b1f1e233204948a0503ffbc1851b39b315ceb6a6aa5d
196 Risk Score

Malware Insights

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

The PDF contains numerous links to external domains, many of which are hosted on compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these external links. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://positiveforce.in/uploads/files/durufe.pdf In PDF document text
    • http://forter.vn/hinhanh/file/nazegugak.pdfIn PDF document text
    • http://bibikid.ru/upload/dudebidafa.pdfIn PDF document text
    • http://palestraarkadia.it/userfiles/files/taxujalosenewalom.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/saxox.pdfIn PDF document text
    • http://novena99.com/uploads/files/202109130306151860.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/52880808946.pdfIn PDF document text
    • http://studiomedicoveterinariobellucci.eu/userfiles/files/dawiferigobutajaxidi.pdfIn PDF document text
    • https://vanchuyenduongsat.vn/upload/files/gitewad.pdfIn PDF document text
    • http://fqcycpa.com/jingkelun/userfiles/files/20210912175336.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16141ccf8d6a6e---46098861201.pdfIn PDF document text
    • https://thucphamtruongxanh.com/Upload/files/10943712927.pdfIn PDF document text
    • https://sysyanginguvenlik.com/uploads/files/wuvexebenujuma.pdfIn PDF document text
    • https://daotaolaixesontay.com/uploads/file/lutizadosevegofatokumol.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/27336176138.pdfIn PDF document text
    • https://servicepapik.ro/files/66272249273.pdfIn PDF document text
    • https://skywaytravelandholidays.com/ckfinder/userfiles/files/xawovexagi.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/8128936587.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb473a3af0---kewupi.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/15601988963.pdfIn PDF document text
    • http://lammensfilip.be/uploads/files/duzipelatidu.pdfIn PDF document text
    • https://uroci-kursove.com/userfiles/file/73688047264.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16141723c84208---37642273747.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+use+chatroulette+on+androidPDF 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_off0000f478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF478 10644 bytes
SHA-256: c18807ddbfb424dc338a19ef92ffa0ab8256c863787791484c08daea0ef1ae4b
font_01_sfnt_off00010ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCC 17452 bytes
SHA-256: 860e40e6012e3ef3f49a226186aa19e48f88e3cc09dfa6c547f748e17a7927f0
font_02_sfnt_off000139d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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