Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc2fb8cef3ddc408…

MALICIOUS

PDF

98.1 KB Created: 2021-08-10 11:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 480201066e74cd282fb6286048d6c02a SHA-1: a1e57d09ef8fa105f8b1597c5087d906032f339f SHA-256: bc2fb8cef3ddc4084ec77e69d34a28fbdab2432d985eabebf44911198d0351a0
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1553.005 Security Software Tampering

This PDF was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to host malicious content or phishing pages. The document also includes an instruction to disable security software, a common tactic to facilitate further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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 https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/78ea87f1fe2737360994c30d61f34e2a/felegirixozezotomebetotat.pdf In PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160befd9dd2314---4801158864.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e16cb3e042---negiko.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cff209e8cb---16211220819.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/26770064243.pdfIn PDF document text
    • http://www.buildingmalawi.com/images/uploaded/documents/9371976470.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/rokurudovomurifagaxeteko.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea155a512e---notawabajadegefeguvixetoj.pdfIn PDF document text
    • http://splogservice.ru/content/file/folavopumumi.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/26374084777.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/88d5eb4a49d553d1211e316999bfee7d/zabuveranapegudilov.pdfIn PDF document text
    • https://hyundaia.ru/userfiles/file/lunekovureberikikejozuv.pdfIn PDF document text
    • https://totounited.com/contents//files/kopub.pdfIn PDF document text
    • http://e-cluny.cz/UserFiles/file/lusivonid.pdfIn PDF document text
    • https://eastmanllc.com/ckfinder/userfiles/files/xeragopowuwolugew.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/79576365128.pdfIn PDF document text
    • http://halaljones.com/uploads/files/82338766688.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160786810bb087---lonabanimo.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/95618123260.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/650a4b0d7482e9e5e3e4e80167f96f18/mevewanodu.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/78198745467.pdfIn PDF document text
    • http://wowbond.com/upload/Fckeditor/file/63438809012.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160838f2b52780---sutosodivaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=why+is+my+xfinity+router+blinking+yellowPDF 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_off000118e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E4 11124 bytes
SHA-256: 5799a5abd1d67aaa99d63009931c2b3a00dfec1cdb501f32af7d4765b35ba578
font_01_sfnt_off000132c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AD2 18188 bytes
SHA-256: 008e395422b950839a1e1b219ef170c06af3656d13079c27e914efec7b76d6e2

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