Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6334c676d4c777a…

MALICIOUS

PDF

87.9 KB Created: 2021-07-03 09:55:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 596046720a9df61d933e3712bc3219b4 SHA-1: 2dcc77cacd949237280d8f618ab1a860050f1c3f SHA-256: e6334c676d4c777acebc70d309864f4e2b9ee45e065652425732291c4a4eb410
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. No scripts were extracted, but the structure suggests a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/4f966412b358a2e7ec592280939e9433/jasinofinazonoponuvimu.pdf In PDF document text
    • https://divinenine.net/userfiles/file/kitivibag.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608872c244fea---10218378965.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/8jpv1ihkp1pq8k68c4r5or86ik/24105889010.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/kcfjr9cl8sh9inf1ef297fg6i4/39913278279.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/1cssiu0f2p13em0qreim597im1/9644862799.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/614bd69ede9f588649410e4e30d89cdf/jugazupegadoviwinepe.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86cfeb54bf---49196822313.pdfIn PDF document text
    • http://kingcraftviet.com/uploads/ckfinder/files/36239988509.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/75179778522.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16078a63924abd---50332296855.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160afdade3dcfa---jitapijetajikibetabepoto.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609c4971b4087---puridomotizofe.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/90662382673.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/rawesofivetu.pdfIn PDF document text
    • http://thefjordbaklawfirm.com/clients/876731/File/gatumopuveke.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/75c5e4831e4d734ca5f92993533573eb/24609971579.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/bapapigur.pdfIn PDF document text
    • https://lesfeesdelhetre.fr/upload/files/89353234401.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb82de657b.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/14327598119153752d305fde127f336b/46088245821.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=psych+the+musical+2013PDF 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_off0000f1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DF 18040 bytes
SHA-256: 67166da115dd9df6ebd3c70a42b34a596950314dfc73d29a7e6f6288a1e0464a
font_01_sfnt_off00012134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12134 10852 bytes
SHA-256: d90ec8f8b91de865f82642a7f522a0cb1b49087fc2946e4430a5bbdb9b67457f
font_02_sfnt_off00013a77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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