Malicious PDF — malware analysis report

Static analysis result for SHA-256 230ede4349393d4d…

MALICIOUS

PDF

67.6 KB Created: 2021-09-25 22:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: fbe62c6df0b996ef21d1d6fe34c7fb69 SHA-1: e358d97dddad092ce9afc70484f0e33cd856295e SHA-256: 230ede4349393d4d9789b7a03d1dfeb22ca71d8d0e512adaa03d81be03644c5a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF exhibits characteristics of a phishing lure, being image-heavy with a single text block and containing numerous external links. The presence of multiple links pointing to compromised CMS upload directories and disposable hosting suggests an attempt to distribute malicious content or redirect users to phishing sites. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to exploit user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b95c2be143---dekapalulixupisesavepowip.pdf In PDF document text
    • https://twinslock.com/locktactyuma/userfiles/file/22198183399.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/wavosumiziburak.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/68400996261.pdfIn PDF document text
    • https://techinnsrl.com/writable/public/userfiles/file/48300607609.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/xurorijuvonapes.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/b8ea0308f73df1699134a10c8ab488e6/57984961104.pdfIn PDF document text
    • https://safetypadlocks.eu/eurostyl/photos/file/buvejimidasuf.pdfIn PDF document text
    • https://mintedimages.com/ckfinder/userfiles/files/gabeletulanikem.pdfIn PDF document text
    • http://cadelupo.it/userfiles/files/76692551053.pdfIn PDF document text
    • https://kimansion.com/uploads/file/26150660064.pdfIn PDF document text
    • http://yevres.fr/ckfinder/userfiles/files/vafijujawemivujaxudusis.pdfIn PDF document text
    • http://www.biogreeno.com/cms/ckfinder/userfiles/files/67537404006.pdfIn PDF document text
    • http://almawred-sy.com/files/adminfiles/files/15771106749.pdfIn PDF document text
    • https://thefertilizerproductionline.com/d/files/menenesexizo.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/lumutixibabapinunetefuni.pdfIn PDF document text
    • https://jerseyshorepirates.com/userfiles/files/zowuferikanazakafamijoli.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/85b5abffc67177814966733c1c47e0ee/pezar.pdfIn PDF document text
    • http://brlairport.com/images/file/30774100245.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/50324767056.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=midnight+fm+full+movie+with+english+subtitlesPDF 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_off0000ab0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC320 14104 bytes
SHA-256: 2e39ce4a1352685812309bc3f21f7b12e50e749c9ec9ed4808c6b128e58d23a0
font_02_sfnt_off0000e63a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63A 10924 bytes
SHA-256: 8a40c203020c088a37640f80a3212767a8bf09c5dd12a438b8b2d345e19c6751

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