Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeefe4cc2d7f3ac3…

MALICIOUS

PDF

81.0 KB Created: 2021-09-07 18:36:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f344f2b8a3bd63c58c64c4863a638834 SHA-1: add7f617d26fb337d7845eeb0c3058d781c1cc7a SHA-256: eeefe4cc2d7f3ac3870eb0b13e89e735c297738c2d4bcdbfede351d5898a0445
164 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links to compromised websites, suggesting it's part of a link farm designed to host and distribute malicious files. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/4b01387e269bd76ffd25b091ff96f9d9/90596100339.pdf In PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1611416484395c---pozoligovoduzawewaw.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/92295505197.pdfIn PDF document text
    • http://spiregene.com/image/files/20210714_015925.pdfIn PDF document text
    • http://dorp.pl/userfiles/files/miwaritixinaxapotazefilu.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/89542611391.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/pemiwadoxuzuboxawej.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/c00c0dbab546fa04fe897fb18cae4b56/xowifedep.pdfIn PDF document text
    • https://dcimx.com/files/wixijapila.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/ud1jbg56t4cfqkshde139ntrik/7428998288.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161261b75629eb---42294278015.pdfIn PDF document text
    • http://latexindia.com/userfiles/file/76938326856.pdfIn PDF document text
    • http://lonerangerfanclub.com/ckfinder/userfiles/files/76331992085.pdfIn PDF document text
    • http://bakoca.hu/files/file/70702070304.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611813e778723---66231516802.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609ade6a68638---tukefemapikas.pdfIn PDF document text
    • http://baovecongtruong.com/upload/files/90187283356.pdfIn PDF document text
    • https://wroclawmodelshow.pl/ckfinder/userfiles/files/35859425981.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cad60e5d5a0---gowexonozezujo.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/80120590157.pdfIn PDF document text
    • https://ngaa.org.au/application/third_party/ckfinder/userfiles/files/wogejenazaxarus.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/3462793047.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612e87df29321---viwelolakozimewebapeluf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=book+of+enoch+pdf+in+amharicPDF 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_off0000ccb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB5 22028 bytes
SHA-256: 3bd49ab44a65f7cb35d58133589d3153abf724faaf67c518f5bf921c7a9d0208
font_01_sfnt_off0001063d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063D 10720 bytes
SHA-256: a748e8a2def3a4dc28da9785e55327de3dce36e728d0a46cf70850f86834fc30
font_02_sfnt_off00011ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1