Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0402e60e5f971e0…

MALICIOUS

PDF

72.5 KB Created: 2021-09-18 13:36:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f7a4bcfcfd773f1fcf4e8184c332af6c SHA-1: 121c1aeb1136c6670fc4248066d1a03fb6cd3699 SHA-256: e0402e60e5f971e01b63c76f90fec65616bdc6ba9bfa4c828d3949e288762ac9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to multiple disposable hosting domains, a common tactic for phishing and malware distribution. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly indicates malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious sites, likely for credential harvesting or further payload 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 http://magogaralbamoble.com/galeria/files/16626537136.pdf In PDF document text
    • http://zhxndl.com/uploadfiles/files/40212580186.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tuzojozunupelek.pdfIn PDF document text
    • https://stpatswatertown.org/ckfinder/userfiles/files/1032290166.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/161400d8bf3278---47472553595.pdfIn PDF document text
    • http://weilandvloeren.nl/fckimages/92430454745.pdfIn PDF document text
    • http://tao-oita.com/admin/upload_filesfile/kuzasuposuvupegomusax.pdfIn PDF document text
    • http://byecook.com/ckupload/files/20211656245.pdfIn PDF document text
    • http://spellenindex.nl/images/uploads/zozejaziralaguw.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/34oqshjj9ll144mi80pqfsbjl5/83759226889.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/jasusovinezaxegejanexenum.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132bd461a2c7---jogajopivebagamej.pdfIn PDF document text
    • https://smartstone.ca/userfiles/files/dodawejar.pdfIn PDF document text
    • http://steinemann-ag.ru/resozajofuxadezov.pdfIn PDF document text
    • http://ncfc.com.tr/ckfinder/userfiles/files/21621582948.pdfIn PDF document text
    • http://24cvety.ru/upload/files/kexozugudesu.pdfIn PDF document text
    • https://windsbs.biz/files/file/joruxuwazimumutaxejuve.pdfIn PDF document text
    • https://alaqart.atelierleuthold.ch/userfiles/files/31487297018.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/48828594363.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/jikasokopukabafojamerezev.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16139b88447ee7---resakibal.pdfIn PDF document text
    • https://www.thaiahpa.com/flash/files/41830845875.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145324ef0e07---jikatalegezig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=sms+forwarder+downloadPDF 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_off0000b801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB801 17108 bytes
SHA-256: 3cd38c232b1b6175105946874ebc215df698d552939f5128cc0a0bd1ac21d689
font_01_sfnt_off0000e48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA1 10488 bytes
SHA-256: 8bb29995eeee8f3b7de759151a1db5803124a175fa61b02b8c8bd907e9c0fef8

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