Malicious PDF — malware analysis report

Static analysis result for SHA-256 69156447621e105f…

MALICIOUS

PDF

91.8 KB Created: 2021-08-28 19:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8d1dba47e967d6229ec40531c8bc9190 SHA-1: fa0811b62140b35dc8e3650f2bbe442afed497e5 SHA-256: 69156447621e105fa66b143d516663072eb82a6b5528c58fde91e748527380de
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the structure and embedded URLs are indicative of a malicious document designed to lure users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://amandatravel.com/userfiles/file/fidejelusipemibip.pdf In PDF document text
    • http://mobilni-kadernictvi.cz/files/file/sadofuxo.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16089a320b6fcc---libegijajodevex.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/narovuvixopitevidimase.pdfIn PDF document text
    • http://ppogrimall.com/upload/editor_image/file/7963389101.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608cdf1b74219---ganaviluwexokenulokar.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/7ea672d9cbc2f13125a5747e1e7886c8/1893090711.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/c76c4a5bc8f074071b11626252282828/dekakowonasuzalavozurefav.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/25117496612.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/kinepiliwen.pdfIn PDF document text
    • http://tafgambiatours.com/userfiles/file/tosapoduzuwinezijur.pdfIn PDF document text
    • http://lighthouseofworship.com/clients/44803/File/kifof.pdfIn PDF document text
    • http://tsrmvolontari.it/userfiles/files/44398814321.pdfIn PDF document text
    • https://12shio1.com/contents//files/mirigunapuxemujevelokefu.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16106000d5a4e2---89833671903.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/80ca596d348f78f673588559a3ef41df/99387206217.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/66174553522.pdfIn PDF document text
    • http://ecandrychow.pl/Image/files/19363530372.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/gsqe9903ab7inmcb1ibra2vs05/nukukonaxupenafulaz.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/letejub.pdfIn PDF document text
    • http://coffee33.ru/archive/file/jujukinosulezipegazosuk.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/10121909710.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac66e2f6c2---56376325837.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/4380ttb8vses4ni4hbmc4uam6u/wuwib.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/26519636243.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=redistricting+in+the+usPDF 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_off0000fe27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11639 18980 bytes
SHA-256: 69d871293145db0836325dc8c56b9cd8cfc2f3c7cbc38eeaacbb74ea9415d5e1
font_02_sfnt_off00014762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14762 10468 bytes
SHA-256: 4a8583c4ac4064d880bdc2092f38177af229471bb04fe4dd00a482a26032ffb0