Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc701af65f91e67a…

MALICIOUS

PDF

87.0 KB Created: 2021-07-25 02:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3d0e46d68bdbc08ed637944b7354d78e SHA-1: 1d7d2c2477a6de3bb58ebe77aaa8e84b0e383a63 SHA-256: fc701af65f91e67a6fb4c42cc37bf7678a02a0442c059b4d932d19c30be07be4
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of multiple external URIs and a link farm indicates a likely spearphishing attachment used to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/htm2kbsvsgrb6brmn8r3b0qll8/runododubabizajologideja.pdf In PDF document text
    • https://masukpt1.com/contents//files/46763606720.pdfIn PDF document text
    • http://proxima-design.cz/files/file/lanujigirarujizexo.pdfIn PDF document text
    • https://faceless.me/userfiles/files/15585448167.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/71441415945.pdfIn PDF document text
    • http://maraulsan.com/ckfinder/userfiles/files/61460897580.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/3f314194554ba65d74fc1d44619c77a2/vuwukudogonadasezad.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160cba408e64b6---mupuledenide.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/c2iu8ml30tvjfu0t8sepfqitsc/gupetavexazik.pdfIn PDF document text
    • https://elminhaj.org/userfiles/file/novuruniga.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4457be26a0.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b59f5f3177a---pozowi.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/d283404f38e2064e47e72e9cda635e78/18073597804.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/pojinuno.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc6f657a07---tunuxalupodi.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/23613094901.pdfIn PDF document text
    • http://berbun.com/user_img/file/muzozowegi.pdfIn PDF document text
    • http://www.la-rocca.pl/app/webroot/files/files/kejaje.pdfIn PDF document text
    • https://bloomeng.com/uploads/jaralixixakagijujetesiv.pdfIn PDF document text
    • http://frigotechreina.com/userfiles/files/busolapuj.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/2ef18222cc02b1e502a3f63ff2016dee/levopelitawomurosit.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f552a72993---zilirowodosu.pdfIn PDF document text
    • https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/e5df65c4edfb1a188b987d95c4103a09/85397774396.pdfIn PDF document text
    • http://cn-polylysine.com/d/files/velevorozixenanazu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=which+betting+tips+site+is+the+bestPDF 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_off0000f1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FF 16720 bytes
SHA-256: d315422a12f796043a8b4ccea315094b1c69d4b5274d66cf6bb503127e404d87
font_01_sfnt_off00011db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000135ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135CE 10356 bytes
SHA-256: 14e7f5ab667b4a4e1eec97ed10d2688848542f5a28d7142cacb2f1a34f16cb00