Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e4df8f4fb83a7c…

MALICIOUS

PDF

139.5 KB Created: 2021-07-17 17:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 094c3f4ba5e22b1b123c273b5a8a3ffe SHA-1: e5aa6020d747855ea21b022eafe39a4be7144096 SHA-256: 17e4df8f4fb83a7c2fc4bde0561840a3299426650fde1764e72f85a920220c50
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded JavaScript stream and a link farm pointing to multiple compromised WordPress sites, suggesting it is designed to redirect users to malicious content or phishing sites. The presence of JavaScript indicates potential for further exploitation or malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://a-mega.ua/images/uploads/file/54288286887.pdf In PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c07130347---wuxituxobedupudisaf.pdfIn PDF document text
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/96689257358.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/4h54d4iuip68h4qn6e85iapk98/95975084545.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/ec3671dcb96f67e9be16edbf51f9c8b8/53416255331.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/disajt9o5r5q04qq0hkkp624p6/ruwigisemusenewu.pdfIn PDF document text
    • http://gumberryoleschool.com/clients/33891/File/fuvejugu.pdfIn PDF document text
    • http://clinicaveterinariacene.com/userfiles/files/98618249431.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/3fb8207e51f00f35aac79e758c2322d7/38543783858.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/99040656075.pdfIn PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/dizenoredixijaxogum.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/a3058c2007a3da46145b1f8afedf0ffc/88576423038.pdfIn PDF document text
    • https://couvreur-hautdoubs.fr/internet_new/images_et_fichiers//file/wojuxi.pdfIn PDF document text
    • http://quimis.net/js/ckfinder/userfiles/files/getawasofuzone.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609f22b3e411d---wapalozegabemomivif.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090a8b12ad8a---xeturozurorulik.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/4407862040.pdfIn PDF document text
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/54142751603.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/c7d4635ccf65b168d811f25665da284c/75149090539.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/1328ccce07b85ac1184b7fd9422d4614/1829399503.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160ae4288a84e0---tekedonevalosavaburuvis.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/0d5f9a958dcd70a48412f4f7568038c9/selav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=endurance+in+the+bible+meaningPDF 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_off0001c098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C098 10752 bytes
SHA-256: 180f3ac9264feb34ad318a9d2776e13fbb9a23ce47157f6bbf19dd6997fa4470
font_01_sfnt_off0001d8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D8CC 17544 bytes
SHA-256: 545f6084b24e1e84b82ae8b7ba4aba1ea85c742492cabc9ab54177bebfa50812
font_02_sfnt_off0002069b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2069B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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