Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa02049d4e401bfa…

MALICIOUS

PDF

76.1 KB Created: 2021-08-29 19:34:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2324f2c0ead288dd5edf587999094e42 SHA-1: 6d747f38035bfa4f68f4b21438443c67106ec8af SHA-256: aa02049d4e401bfa3a022b2e7cdea1d00eff1f906cd1d512e394f7ea2e4537e3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a link farm pointing to numerous domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution campaign. The embedded URLs are designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://synerhu.ru/uplcv?utm_term=how+to+create+multiple+pdf+files+in+one PDF link annotation
    • https://blv.by/upload/editor/files/71767785366.pdfIn PDF document text
    • http://rajasthanmetals.com/userfiles/file/83167460889.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094beccc7ebb---45673628989.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/29914474136.pdfIn PDF document text
    • http://nbnjl.com/userfiles/files/titavisagugaga.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af96e472603---53915455648.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160ab09e817309---visawig.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/66446993384.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e41632e23---41783908733.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/xilefeguda.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/zokaxuxunujumufugigozavu.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160981bc78342d---23777658777.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/f0b8ef43e902430d77d6e25c5e447b8b/fuzol.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16079f1c897ddf---10576240447.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6d4bd0bc5---45630099956.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16074137a665d8---75090283064.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/nufenerodoxonozajupuruxux.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/klc272njkg8epnras32m0n63tp/4737616089.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/cpor5ubt7qhevjp0od55rlprp5/19119605535.pdfIn PDF document text
    • https://olboihorgaszto.hu/editor_up2/56682367510.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f17d0684cce---vamekabobiralowepopubisut.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/fuledapedajexugi.pdfIn PDF document text
    • http://teamhead.net/userfiles/file/budetebivaxokulavavuzi.pdfIn PDF document text
    • https://www.gryf-wet.pl/ckfinder/userfiles/files/zekakukudaxebamosimo.pdfIn PDF document text
    • 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_off0000c57c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC57C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8E 17048 bytes
SHA-256: 9385a834c4161580a5c27ea54f4ff59fa3289fbe4f54b2f911392657ff288974
font_02_sfnt_off00010925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10925 10956 bytes
SHA-256: fde53877a3f97fe35e004ff0bafffbebc27b8a2e0d115cc143aa3a1b55d9e018

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