Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d4700d3048e465f…

MALICIOUS

PDF

97.1 KB Created: 2021-08-15 05:12:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1ed445f8dc0942ed00c9e1fad0f14825 SHA-1: a51ce953799925c3dd333a856f64250c94554a6f SHA-256: 4d4700d3048e465f7966e9f6cd37a70d04252d3746955ed0a628de79ae42bc4f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV, indicating it is a phishing or trojan PDF. It contains numerous links to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The PDF's structure and embedded links point towards a tactic of using a link farm to obscure the ultimate destination, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://olympusflights.com/files/files/42479561667.pdf In PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/j1io3i3b4jm9b4chgpp8ugaf77/55512306980.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/ed345f136a251ef269581e3a79c4a5d3/56164321239.pdfIn PDF document text
    • http://www.kilincsweb.hu/fileok/file/jonugok.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708f039bf23---83060714654.pdfIn PDF document text
    • http://rivieahk.com/clients/5/51/51325344bd1517f257d6959d5350918e/File/83661142199.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/pewepamanuvexirukotatusuj.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/f723b086503403d0fa4d1af2082e1a14/85311215896.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/32740844854.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072391c67681---76440866578.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/36f4c019525bef1b9c0e1f5adefda17f/ravomamitinifekuxojopunej.pdfIn PDF document text
    • https://blogsma.com/files/32144522799.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075e7d3b4873---josese.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16106f3ff29c5c---89983483350.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b2299845082---mopesovofel.pdfIn PDF document text
    • http://ambvetesopo.eu/userfiles/files/bufomutix.pdfIn PDF document text
    • http://fairview66.org/clients/866114/File/vezokuriwisekal.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16088089c25296---83543049558.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/rotebunujivodibeb.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/1057136a16372051868ff57344d39526/75770229056.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/40df1f38be8d8a6ef6e8bc60e8cdaf7f/fabebulabagupugopisibu.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a79f89cbf7e---zufefelakorumavi.pdfIn PDF document text
    • http://sshs1962.info/clients/3/33/33dcd814b32da85629335a95ab3d0158/File/xeboduras.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=guia+de+consejo+tecnico+cuarta+sesionPDF 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_off00011562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11562 10584 bytes
SHA-256: 52d599bd282848e459ca098956c391c762c64ca2144a958a9ac282822d6b8a29
font_01_sfnt_off00012da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA4 18536 bytes
SHA-256: 55d65b234de42c55684a17e09377996a72d53cbcd027b76d57a17f0c06bdc18d
font_02_sfnt_off00015ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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