Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e301bf2f92ae6c…

MALICIOUS

PDF

82.5 KB Created: 2021-09-06 21:37:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2116e5d163796936e3f6002b07966219 SHA-1: 4dde6762d48ea120d3e06e8ee940d86aa1149471 SHA-256: 17e301bf2f92ae6ce7898964cce933fbe19a07d4a5a4041067d12e095efb8435
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users. The presence of these links and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://irlanc.ru/uplcv?utm_term=asma+al%C3%A9rgica+pdf PDF link annotation
    • https://msvadba.ru/files/file/fajonivepawajubumob.pdfIn PDF document text
    • https://australiancaravancentre.com.au/application/third_party/ckfinder/userfiles/files/famul.pdfIn PDF document text
    • https://takipcisec.com/calisma2/files/uploads/binej.pdfIn PDF document text
    • https://itexpertdog.com/upload/files/guxizibi.pdfIn PDF document text
    • http://www.plain-pied.com/editeur/ckfinder/userfiles/files/11687738545.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/72794284874.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/778e3c77a97da9735efe4e19a8146365/jupitebizofuvexolifiziven.pdfIn PDF document text
    • https://lepjunk12.hu/uploads/files/mugozawifiso.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160757933b3357---fonaxusazosov.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a40a41dac---8350616574.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/51028203195.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074ceb906c73---sirunikukamazaserisewagi.pdfIn PDF document text
    • https://kaparatt.com/images/File/bavumovoki.pdfIn PDF document text
    • http://diamant-x.sk/UserFiles/file/fatamojuxiwekob.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e5e043b04---19568189681.pdfIn PDF document text
    • http://architettotoma.it/userfiles/files/28810144308.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/guxodosedub.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24f6973dec---92559208507.pdfIn PDF document text
    • http://hzdsbg.com/uploadfile/1621228052.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/sajaxutajezikavoripijugup.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/7900275fe67427fae67b4b6fae2849fc/46485321870.pdfIn PDF document text
    • https://vinaconexmec.vn/uploads/news_file/mezaxukijidimirasar.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210826000436338.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/0ca986552b7298b86c88e51c5f5111c1/91925906347.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_off0000dd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD14 10644 bytes
SHA-256: 7f00158c351bd6e6d380235406119640d1e108d8be0d5f230a747eba503b74a3
font_01_sfnt_off0000f531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF531 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D43 18272 bytes
SHA-256: 67e89b17e40e13c382c5cdc970d54826819cc11e53a4ddbdd80598f729027f9d

Open this report in the interactive analyzer, or submit your own file for analysis.