Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa3022ed06cf218a…

MALICIOUS

PDF

81.4 KB Created: 2021-09-08 05:23:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c29140b7c9737286f18476c0cd9596f3 SHA-1: 7ab315c23c9a1a9e5ab0044c7a8e5e7994a16646 SHA-256: fa3022ed06cf218a217aea3e21283336200009c6ca4bf9bf964c181c68ed6087
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with multiple heuristics indicating it functions as a link farm. The embedded URLs point to compromised WordPress upload directories, suggesting an attempt to host malicious content or phishing pages. The document body is heavily obfuscated and unreadable, but the presence of numerous links to potentially compromised sites strongly indicates a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887ac2ca843---12251498971.pdf In PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7809f2891---26273881512.pdfIn PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/xoninagurepiruzigego.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607acd23609cd---nobepu.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/18402321904.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d3d55048b---jepalelamot.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/parudewobufoge.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/nakeniwoxo.pdfIn PDF document text
    • http://armanetti.com/images/magizakexozosasepa.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/9462723763.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/324483a09cd948a9a46c34618b9195ce/lupalezu.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/rvcuf5k24i7t8a541816mlmdcu/tujolopumex.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/43780875590.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076061e2a515---98950026478.pdfIn PDF document text
    • http://jar-ted.pl/file/porebasaxamuzokaponepawa.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/69563902894.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612c33d5805fb---jegajubarusiwa.pdfIn PDF document text
    • http://quangcaosms.org/media/ftp/file/subisip.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6c4dabeab---41978109482.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/febizixalamiteroxufigutej.pdfIn PDF document text
    • https://realxenon.ru/uploads/files/75941549507.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811b9a7c1b9---lotij.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/c2f75ca1095010e37eb666c684dd329b/95435934219.pdfIn PDF document text
    • http://angerdress.store/ckfinder/userfiles/files/pirurevasogigo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=barnes+akathisia+scale+pdfPDF 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_off0000d990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD990 10740 bytes
SHA-256: 0ec9f27f8167e3fee235b232ba1e4a6c953890a108b5ca5a967b97e237b096a4
font_01_sfnt_off0000f230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF230 17776 bytes
SHA-256: 4b55767259e0d9b25de253bd69a6b1163d1fc968bd2a09fb6e197e6250f821df
font_02_sfnt_off0001201b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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