Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd94eb84096e9b5b…

MALICIOUS

PDF

82.8 KB Created: 2021-08-27 13:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b00ae4049dee9e23727f2045852140da SHA-1: 4897dc77103aa359eecd5e98b2335b939fa81c53 SHA-256: dd94eb84096e9b5b7f3d2ac9447d339fa4014dff97b3a2358b6027722a6700ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these redirects. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://nmways.com/uploads/fckupload/file/65602173212.pdf In PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795ffe14afb---goxub.pdfIn PDF document text
    • http://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/mibemovaligujisikomu.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860e41d5a22---10521019204.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/3a90feb7c44003419d113fed6f54c9ee/sinemajunez.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/8585ce759d31cecea54c78dbbd4e5048/26988470917.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077e78dd0d67---tewitatire.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/fusugug.pdfIn PDF document text
    • http://alexdisinfestazioni.com/userfiles/files/60547362366.pdfIn PDF document text
    • https://citytrafik.nu/images/file/lupujoxiraloxaruga.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/ddhjrbfns06hi27mpst9lffq6n/gotufidorun.pdfIn PDF document text
    • http://championshipsportsrings.com/clients/23492/File/38707553805.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/a682qenfseqtolpgjd46hq026a/magemabuvetotime.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/49e68159174bbb484ec46fac3db72eea/99901127233.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae7c813827---26904941171.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/34647670784.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609db359df6ed---13526729633.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/a39c1efdbb99bc7c549f84a08ba2fe0a/mukozulutev.pdfIn PDF document text
    • https://comtraining.cl/userfiles/files/25680598009.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/3628342142.pdfIn PDF document text
    • http://websteravelandscaping.com/editorData/file/80871594817.pdfIn PDF document text
    • https://ptogel2.com/contents//files/povojisekuze.pdfIn PDF document text
    • http://waetsukai.jp/system/ckfinder/userfiles/files/7522185791.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/0e121c3d36d70b22e75bb6a2b6a32b29/buzaw.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609c22d3ee575---71235454437.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=diana+krall+christmas+time+is+herePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD33C 18464 bytes
SHA-256: 7f76bd1cb813ffb313dea76c38607d257781d43103667155de102a4ab8e09e72
font_01_sfnt_off000102dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF3 10468 bytes
SHA-256: 20536febdd587ca65dfcb5cbc65bda737bfca3f9f093f5e4538a4192d0a9ed3f
font_03_sfnt_off00013280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13280 2460 bytes
SHA-256: 0c594713f03625356741d73e943e4bffc9f5119f0395b56843900263e035a538

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