Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae5941970df838a3…

MALICIOUS

PDF

83.3 KB Created: 2021-09-20 12:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 48960f7d989c9af939893a8794e2f7ee SHA-1: e4b1d50e2780e0499eb88363d85b9b2e4aa57c1a SHA-256: ae5941970df838a37887753d2ceb9df7a99e010d671040afcd308c970248a990
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised or disposable domains. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs suggest it is designed to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://amoslodge10-org.alljobsinliberia.com/ckfinder/userfiles/files/jiforudurenovatawipap.pdf In PDF document text
    • http://eternaseguros.net/files/files/setuxafurodulesariwawigeg.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/78696466392.pdfIn PDF document text
    • http://dichvu12h.net/userfiles/file/34476823176.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/xosipabijazujexorosemum.pdfIn PDF document text
    • http://sysquare.com/UserFiles/files/85958430029.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/161394a849c453---subitiluzigajiwile.pdfIn PDF document text
    • https://stayinbranson.com/ckfinder/triplebuserfiles/file/64349886361.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/10083900210.pdfIn PDF document text
    • https://bbu.vn/Images_upload/files/54712437392.pdfIn PDF document text
    • https://grandhotelushba.com/userfiles/file/zademizi.pdfIn PDF document text
    • https://komunalno-vrgorac.hr/files/vizaw.pdfIn PDF document text
    • https://www.paseppe.gr/ckfinder/userfiles/files/durifadidegomegexoxar.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/p6q5ruo8fstjvbnrlrblkbhrmr/melijaxuwefipomurerigaxel.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142d3b36bb3b---13083014783.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/tesirotevew.pdfIn PDF document text
    • https://oreopay58.com/ckfinder/userfiles/files/nazirav.pdfIn PDF document text
    • https://www.q-jin.ne.jp/ckfinder/userfiles/files/67808756285.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/161484f4d0d3a1---kililafo.pdfIn PDF document text
    • http://gtlfuelmarine.com/userfiles/file/tanatuwedukojivusumis.pdfIn PDF document text
    • http://creationart.hu/files/file/55566536867.pdfIn PDF document text
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/53012340336.pdfIn PDF document text
    • http://www.luna1956.com/images/library/File/35310008709.pdfIn PDF document text
    • http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/87389068865.pdfIn PDF document text
    • http://chochosanencino.com/uploads/files/8897246503.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/lejisaluwalojipiwejuzifo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=periodic+table+pdf+a+levelPDF 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_off0000e12a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12A 17804 bytes
SHA-256: 9cc4cad579b38ddb2fc79053bb0c678376f0114d3610de3fb624360a9ae0f4f1
font_01_sfnt_off00010f29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12740 10548 bytes
SHA-256: f5a87c2bcbb3c9c9a8cabc044898a8f0735387224700fdbd7bd5a1a6fc4e6b94

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