Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8aad6c11b6288d3…

MALICIOUS

PDF

82.5 KB Created: 2021-09-03 14:01:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8196678b3cc9987bf8c33e7a8509d386 SHA-1: 127e9f5e82d30fb0c34e81442666f3ce7b479927 SHA-256: a8aad6c11b6288d3fb458d8234ccfd596c08568b319ca6afd1a2fc068ccedef8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or other disposable hosting, indicating a link farm designed to distribute malicious or phishing content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://medius.sk/userfiles/file/mojaz.pdf In PDF document text
    • http://smepil.com/ckeditor/userfiles/files/22609144115.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/58072120112.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c85e66ba62b---motunexipid.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16124fb32eda4c---97144884786.pdfIn PDF document text
    • http://hotelclinton.it/userfiles/files/40313738111.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/72351890466.pdfIn PDF document text
    • http://apmnir.ro/fckfiles/file/gimogodige.pdfIn PDF document text
    • https://meritumptt.pl/dokumenty/file/73070513229.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/likenufevipedifafoxugigo.pdfIn PDF document text
    • http://flirtproducties.nl/ckfinder/userfiles/files/44666113910.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/memabizelugopepa.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/nowuxabusojojarefobagiw.pdfIn PDF document text
    • https://bibliothequeanglaise.org/upload/files/nedezotagogimo.pdfIn PDF document text
    • https://maturana.cl/upload/file/42927326911.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/9f53856c5c1ce432e6c640310aa09bf4/51008323740.pdfIn PDF document text
    • http://noospc.ru/SITE/files/editor/file/depupe.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/06/file/202106250358594666.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/wixepara.pdfIn PDF document text
    • http://world-system-packet.com/userfiles/file/79271540752.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/1e826280c7a5ff16131efdc60762020e/xogaratenidemitenug.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210604191827.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/nazuguzadinidelizigijugoj.pdfIn PDF document text
    • https://badoza.net/userfiles/file/53557332923.pdfIn PDF document text
    • https://forumhrdbekasi.com/webroot/userfiles/files/xizanopar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=transcription+in+english+language+pdfPDF 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_off0000dbfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFD 10960 bytes
SHA-256: 6a3b45416610167ce417056dc31c3f104629e71b7f52138a3a9ea69188184f19
font_01_sfnt_off0000f51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51B 18268 bytes
SHA-256: 8539629b4a618b78b8b9b5c58f740c1ee3a36298bc79e4203ff8d6b39b037aef
font_02_sfnt_off000123e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.