Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa7e714eb78b350…

MALICIOUS

PDF

83.4 KB Created: 2021-09-01 08:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 69431e54e86c8e06fcaffdc551c12e75 SHA-1: 11fef64144585faa79409022e8f516d18b83329f SHA-256: 8fa7e714eb78b350af5116ee5578e467de880d52c3d3c159540aff731dd22517
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised WordPress upload storage. This suggests the PDF is likely used to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://facilitymanagementassociates.com/survey/userfiles/files/geluwajopajafab.pdf In PDF document text
    • http://ardennes.proximeo.com/ckfinder/userfiles/files/bofifavazebitudosemax.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16087aba47687d---gojumuvenuwuwapefi.pdfIn PDF document text
    • http://2021woods.com/clients/b/b0/b0e6999751250b7f6f06d89f33415bdd/File/10322693926.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/45a946a5bef981122793d8090bdf184f/mawawupafut.pdfIn PDF document text
    • http://netcentricnj.com/ckfinder/userfiles/files/62659344047.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/84976216938.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/3410964131.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/26324851277.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/95713331885.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/js620kmvb2a2vp29adh82nv0sb/sejolibazekezevawu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adde7c8b769---sewapomafiten.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/ddbf14faf365c306c607904b672e395e/57920980339.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/1t9bqclvka78tncj1kg6k9l2cg/muwejozubavanabesixe.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/32150979726.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/h1sce203capmo5a7g090dpl807/papidoxumegogoxed.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160819b76282e3---futufalakewigunititoja.pdfIn PDF document text
    • http://zoekidsworld.com/userfiles/file/fofilugit.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/803f65df5f96d149927efdc42dd73cbe/36289092719.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1610cd669484cd---66118230923.pdfIn PDF document text
    • http://pincodehub.in/userfiles/file/sowadeduwegoluvofuva.pdfIn PDF document text
    • http://cpbnatation.fr/fckeditor/userfiles/file/49357473201.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/gakedaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=strawberry+cobbler+with+oatsPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE043 18248 bytes
SHA-256: fbbdffaffa5f10de937c1969fb2acda06d65af0f2f24838311e3ed98e4e38791
font_01_sfnt_off00010f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F51 10640 bytes
SHA-256: 2456caf85961d16e4923f77f1a419da3ea2075ff0c8dfa0b80c05bdee9eecf1a
font_02_sfnt_off000127e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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