Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e28e2106d82b132…

MALICIOUS

PDF

86.2 KB Created: 2021-06-27 15:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 2bc54a2a129180ada3b555a16e21d800 SHA-1: d9f89d66bd979490f1a6f1385dbf812f6275cfa6 SHA-256: 1e28e2106d82b1328b009ae3fe7100f4fdc018ca3a7e389559e23dccf3ea4370
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3beebc110f---pakalimotatibafiwuje.pdf In PDF document text
    • http://colescastle.com/clients/875019/File/midoduvumukirovizazimi.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/bifozedilajow.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d8d2723a3---zozanibuvufi.pdfIn PDF document text
    • https://vivaldiroberto.com/img/files/mediafiles/file/fupumobas.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/b0ovge8qvf98o2vborlqcgle7u/peparovakujej.pdfIn PDF document text
    • http://zimaletto.com/uploads/file/75376009111.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/82731412219.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780fb1de433---xosuge.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160811234c8d82---22352309070.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/xitaketidado.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1135271c6d---tinemajuxokufejuwok.pdfIn PDF document text
    • http://altiro.nl/home/tjerk/file/jafatubajivurofizuwa.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/1313e6eea3a09f6dd44cbe07a2f93f96/57108203554.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/19893482072.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070781779386---lofowoluwotenilaji.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c89ca881903---84637071085.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5ede39ec3c---10607864020.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/75834884195.pdfIn PDF document text
    • http://ezibra.pl/upload//file/40502039170.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1608143f0ad59d---xowadanufazinofajotevu.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/wojizab.pdfIn PDF document text
    • http://ldbell1965.net/clients/85689/File/85973792305.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=ancient+aliens+free+streamingPDF 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_off0000eb1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1F 18336 bytes
SHA-256: b8e78deea99c0c3fb59ddd5b80387bd7b91a98b0fed6f802de2596a1f4878b5f
font_01_sfnt_off00011ba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133B7 10540 bytes
SHA-256: aa4ea897704a5d2e67fd2968c4062b6431550b5c280cf1294e1f72c3f2cdd2c0

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