Malicious PDF — malware analysis report

Static analysis result for SHA-256 483270698940ec8a…

MALICIOUS

PDF

74.1 KB Created: 2021-09-18 23:36:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: edb165c16b366da54ec65007e1bede30 SHA-1: a6c2acc91eb7edffc90e8ce4863bca84a1cb3d9d SHA-256: 483270698940ec8a59e35632440c4cecdc4f5193bf7a8872eceb0e35e5e79db4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and link farm heuristic indicate an attempt to lead users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://garglob.ru/uplcv?utm_term=android+resize+imageview+based+on+screen+size PDF link annotation
    • https://zoldlepes.hu/userfiles/file/latiwuzoxofipa.pdfIn PDF document text
    • http://jingyitech.com/uploadfile/dozajumemovoleneko.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/19332930738.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161355d7dc6775---kajegalibavibozirinazixi.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/file/63976698513.pdfIn PDF document text
    • http://chrisdepanneservices.fr/Sites/cds/files/zadirorevezurinedajin.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/05290f390d2f58d5f5ee5ec380e49341/19393186058.pdfIn PDF document text
    • https://clearpatth.com/userfiles/file/89223434442.pdfIn PDF document text
    • http://yukamifashion.com/upload/files/81490658173.pdfIn PDF document text
    • http://www.mmalappeenranta.com/tiedostot/files/47877542077.pdfIn PDF document text
    • http://thietbibepnhahang.net/media/files/27214513849.pdfIn PDF document text
    • http://sourceit.ke/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/garaxewowajejekegatixilat.pdfIn PDF document text
    • http://www.sindafaz.com.br/admin/editor/ckfinder/userfiles/files/76352677002.pdfIn PDF document text
    • http://vpsystem.com/files/fck/juwewedalularilojosuzupa.pdfIn PDF document text
    • http://www.grifin.sk/files/kenemidalizedikivokiwow.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/2b8349a0ec79a0ebee032ac988ed4fca/vodinawexegejevezere.pdfIn PDF document text
    • https://phukienbep.net/media/files/bukakogi.pdfIn PDF document text
    • http://ceramicaartisticamarsalese.it/userfiles/files/44648727933.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/goxasirerojivo.pdfIn PDF document text
    • https://www.cylinder96.ru/admin/ckfinder/userfiles/files/9777231489.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144f8197a022---jixomukelavamilaj.pdfIn PDF document text
    • https://truongthanhco.vn/webroot/img/files/44649582745.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/wotupotawisabebizagutus.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_off0000bded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDED 16780 bytes
SHA-256: 3b1901f464d8b679441d0a7a8588d45dac74a4af9eb75d497ec40f63616151ab
font_01_sfnt_off0000e904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE904 10904 bytes
SHA-256: d05eef133c729245d009b99c102c71018f28e250b2f3ec87315ab5fe86e751f2
font_02_sfnt_off00010227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10227 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1