Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bbbe54c3a0114ea…

MALICIOUS

PDF

99.5 KB Created: 2021-07-27 09:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d0b6f8d55398e21eaa8a67a599f6a619 SHA-1: d19455767411cf8d5a29523af4a52fd9a2bf024a SHA-256: 8bbbe54c3a0114eadacb6206372596017ab204a7224a57ba38a0489bbd098a77
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs that point to external websites, some of which are hosted on compromised CMS upload directories. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

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 https://hoangnhataudio.vn/media/files/bulakudesara.pdf In PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c452b2e251---negijavepu.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/28420181546.pdfIn PDF document text
    • http://covinahigh1980.com/clients/1/14/147ee80f0cf2e08ca1b5067d21485a43/File/lugekedidumepetasiva.pdfIn PDF document text
    • http://21cedu.com/pds/userfiles/files/17888611529.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/rilotagemelerer.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/jafofuditikepuxaja.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/52036756409.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/ovm12mcmbfn7ll8qeofbo1nfs1/20151233758.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/jamivajoga.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/niraluzexasi.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/tepagisor.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0496688f6---lanujaredurijenore.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e146e613b0---kuxoburebekedono.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bae284589a0---17961893007.pdfIn PDF document text
    • http://gtshotel.it/images/file/4431452744.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c111542b9---kamazote.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/ee10c06fa34b21d46fc008124235f8bf/gowegadofojovutofem.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/gafalomini.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/77460771279.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/9122856410.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/804377987.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081bc8c7520a---rabivoxonudedirefudivig.pdfIn PDF document text
    • http://farmaciacogliate.it/userfiles/files/vuvafatup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=eagle+scout+statement+of+ambitions+and+life+purpose+samplePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA6 16652 bytes
SHA-256: 54efdeb6116dd4867b6ee0f13bb2a8a91f735202974c9ac6b8d6c739c0172409
font_01_sfnt_off00013696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13696 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EAD 11188 bytes
SHA-256: c3fa26ce8e8dcdcc376ca38554fb037b7910e5a96a4c6c34f63dad8568e0cf27
font_03_sfnt_off00016864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16864 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae

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