Malicious PDF — malware analysis report

Static analysis result for SHA-256 96cda9ca69dc2a3d…

MALICIOUS

PDF

83.1 KB Created: 2021-09-06 05:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 570615feec0663e1f9a9d6620edaca3a SHA-1: 2ae4c8710a3bff53c6cb7a4bd98a4b4b7b9bf5e2 SHA-256: 96cda9ca69dc2a3ded03a8b86340193eceae9f74dd9e969d99142e5857bc9b5d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

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://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/2dfbd37e24d6909bb0849cc9686d0897/levixowimajipejigobuwalox.pdf In PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/qmvh6fjpdfnmh6ka6lkcibfv2h/13939083956.pdfIn PDF document text
    • http://guowangcable.com/d/files/nifaj.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/7ecf5178bb5aa43053ac99e9ea482dfa/55913224410.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160843b258e4b1---lulat.pdfIn PDF document text
    • https://anaksemut.com/contents//files/budetopejifawetijaper.pdfIn PDF document text
    • http://aqcons.vn/upload/files/wikekumoxajojoxaxajokove.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16081a81173d01---95513986754.pdfIn PDF document text
    • http://faisaltowel.com/survey/userfiles/files/28113860140.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a26e9b5c921---83158703073.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/f20e9c27cf706eab533061f92ab8e47c/56030907124.pdfIn PDF document text
    • https://truongthanhco.vn/webroot/img/files/34886410365.pdfIn PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/73544837955.pdfIn PDF document text
    • https://ozsersogutma.com/upload/files/felunavizoviter.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/78829143317.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/m5u4c5h9n1419se35cf4rajb88/12531460980.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/jizumokoba.pdfIn PDF document text
    • http://master-br.ru/img/file/lujosi.pdfIn PDF document text
    • http://eg-connect.com/uploads/editorfiles/file///38588455640.pdfIn PDF document text
    • http://akgwealthplanner.com/crm/files/61980152794.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608d943812211---3410414705.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/635eef6a4c0a3af6797ea41a57019099/fafatizejegobokigefakumed.pdfIn PDF document text
    • https://viessmannboilers.ca/fck_upload/file/nusafukisol.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/bajasibetidorararopowok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=present+perfect+tense+formula+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_off0000e059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE059 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f86b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86B 17572 bytes
SHA-256: 7e4242562e5488a7a9561b7fde23bc2af87f72254dd92ee7fc59cf05cbc72de0
font_02_sfnt_off000125db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DB 10788 bytes
SHA-256: ecb3251b4bda79e412429c435d1ae3b7eb8da4d03be753ceec7a3db9a557f63d