Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e4e2e3c96ea54f9…

MALICIOUS

PDF

77.4 KB Created: 2021-08-29 13:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 726e2bb6b3b6793e4fc6e331da058165 SHA-1: cc490b5033c4f8e90b2cd8545dafc3354d0a746e SHA-256: 2e4e2e3c96ea54f9f68607b493825794e105a2a47a7e6246807f29d59a32160a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised or disposable domains, indicating a link farm designed to lure users to malicious sites. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest a phishing or malware distribution intent. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://tradeweb.es/userfiles/file/48698675612.pdf In PDF document text
    • https://aquamedicasatumare.ro/ckfinder/userfiles/files/jolaturirisesarizuwafep.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/2e0d4032fc0fa607ff8f46dd97cda92f/rovejixilajifefatibokig.pdfIn PDF document text
    • https://detector-billetes.com/Imagenes/file/111034140.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a358f2311---78359605505.pdfIn PDF document text
    • http://csa.china-led.net/static/editor/ckeditor/ckfinder/upfile/files/71459709796.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/6a01b3fb5a3e1399aab1aa27a2c81e3d/pefororufapibirewon.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/16094c206ded2f---54937084916.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859cd521bcb---65478480547.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/66b75572088a1ed8e13b60f2e5e45d73/xisubapofoxaritinupa.pdfIn PDF document text
    • http://lesmashclub.com/imgUpload/files/19484696408.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/57916184a3b15a7d3b044c032c4fc02d/mogavabozubida.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/fatavu.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16116c491348df---50413336944.pdfIn PDF document text
    • http://arslanemlak.com/E/file/30509295024.pdfIn PDF document text
    • http://civicwomen.com/ckfiles/files/zijidinaxerorip.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160831644127c8---11637486344.pdfIn PDF document text
    • https://beldaoyun.com/calisma2/files/uploads/30739904083.pdfIn PDF document text
    • http://nhactheducthammy.com/upload/files/37499337841.pdfIn PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/29019132784.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/614faf3b61c016a2ca05879b18ae6823/xaluxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=home+by+blake+shelton+and+michael+buble+lyricsPDF 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_off0000c8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B5 16376 bytes
SHA-256: 819a1466c68bf497b1a388fa94c696bddf6bceb19093d5eb7a0a1508d52e412c
font_01_sfnt_off0000f34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34F 11072 bytes
SHA-256: 095218ef5d0b1ba31bfb87d939f2a54002ccb20fe19056711f59249f5e791513
font_02_sfnt_off00010ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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