Malicious PDF — malware analysis report

Static analysis result for SHA-256 04dd1a6e34f5cf17…

MALICIOUS

PDF

86.0 KB Created: 2021-08-31 07:10:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 46a81820ba5165ffaff7f4bb1a9578e1 SHA-1: 90987ff5fb970d506b85f7289be6209b716a6934 SHA-256: 04dd1a6e34f5cf170c901ed2017eaace43f13359777652bc5425891f046d9724
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various websites, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://www.jasfec.com/imgs/uploads/43880681560.pdf In PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a009c525377---lanebejokiw.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/627196037.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/dr4snj2k7jv6s6ib2o3f4g4e0g/gejekalamubabedukod.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/jodagonepesunoxuluve.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a08c50960---59043216663.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/jenitetumigapoja.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/c118d9935e9d43d39687d162c15ab0a0/xegezujamixilasegewuxepoj.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pomalo.pdfIn PDF document text
    • http://jpbullies.com/clients/2/2c/2c827f09d77a589c2c5c7da8c033a3f4/File/nedivanavigojetaligakixip.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/69b285209edfe668d2d509e14e32d748/70607628052.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/gujaziwasekibo.pdfIn PDF document text
    • http://astro2sphere.com/admin/images/file/zebidamemapegavoke.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608345c263e86.pdfIn PDF document text
    • http://cudicio.it/images/file/pizirigimekulaxudedonel.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/7ff1db85df28213c98a843c73590c2e0/badixowanezuzax.pdfIn PDF document text
    • http://tradeweb.es/userfiles/file/piladagezumoserox.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/domuj.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/migatijodij.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/5a42a348140c0cab0ceb816a1ce75d94/78606260252.pdfIn PDF document text
    • http://samrayburnclassof1980reunion.com/clients/873185/File/wakuvakifuxuvu.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/391b34aa179f20f61ec5e67e56fd9971/kofevoxikusuluronofokuzo.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/51919801347.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/fe7e448291883d0b5920e83e963536bc/28770474085.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=dirty+riddles+and+answersPDF 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_off0000ed03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED03 17748 bytes
SHA-256: 447b8aa3cea1e990d6eec86b5818c7e08f4c26e98e7fbb2880c45707e218a8fa
font_01_sfnt_off00011a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A87 10324 bytes
SHA-256: 519c1a07172c1782aa188160f68ab7e77065d4a3cd5cf45e37120f7551aaaa71
font_02_sfnt_off000131fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1