Malicious PDF — malware analysis report

Static analysis result for SHA-256 5679b2bbea03045b…

MALICIOUS

PDF

84.5 KB Created: 2021-09-03 22:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: de9e0ead9fd73e0e1f8bb4dbdf829c11 SHA-1: e0cf0295bc80152c9d466f5487831d6264a40c7c SHA-256: 5679b2bbea03045b1fbe22474cea656a3ab74f01fa2706359aa088f56308f2b7
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous embedded URLs that point to compromised websites and disposable hosting. The primary purpose appears to be directing users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://wastran.ru/uplcv?utm_term=alprazolam+0+5+bula+pdf PDF link annotation
    • http://metisentry.net/ckfinder/userfiles/files/40625901430.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160757916dd68d---54831754836.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/28478047158.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/7986e4bd8c697846fd5103b2d7add8ae/88169797921.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/8575e7db98024a48d724f2e584668517/fowasafugebapep.pdfIn PDF document text
    • http://firstcuwire.com/file_media/file_image/file/sajapewigalavel.pdfIn PDF document text
    • http://soldearenales.com/galeria/files/kegilasixejawijonupomuvar.pdfIn PDF document text
    • http://jiin-torng.com/uploadfiles/20210822015327.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ac01db847d7---67521324068.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/020547259104.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/31fdcd3354b77457e2876a7bac618cd1/modibaxajabenalilaja.pdfIn PDF document text
    • http://polipadel.com/userfiles/file/bejituwinugesud.pdfIn PDF document text
    • https://semineebrasov.ro/printuri-fi/files/83749432412.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/62734173242.pdfIn PDF document text
    • http://mprime.net/ckfinder/userfiles/files/jogoson.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/kuvabezixunalovetexad.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/k5qrpgac0cqelpatihdfpo85l8/72925077655.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160ba132ae2347---fijowuvefuzowatefubokadil.pdfIn PDF document text
    • https://gabconstruction.com/ckfinder/userfiles/files/juvizafozuwesozub.pdfIn PDF document text
    • http://aquitaine.annuaire-regional.com/ckfinder/userfiles/files/janurojesugomilopojuvod.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/ab8e22b0a955b39ba545f675806397c2/8277564908.pdfIn PDF document text
    • http://hangtatmj.com/userfiles/wewujodituwejaf.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_off0000e49d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49D 18364 bytes
SHA-256: b6542d05fb3c634b49a380326a0235e6cec64029616442ded7443cf6f895acd1
font_01_sfnt_off0001145e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1145E 10604 bytes
SHA-256: 76eb9f587a214b630bdd6bd9dc064b5d76139daa5d597c50fb4cf45638d12cd9
font_02_sfnt_off00012c71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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