Malicious PDF — malware analysis report

Static analysis result for SHA-256 2492fea2ea3a4cc7…

MALICIOUS

PDF

92.9 KB Created: 2021-10-13 01:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7968310ea20dfb132e8cfe5e4e30dc09 SHA-1: e80d2dfc1ced5315a957976f94384148b49eb8d4 SHA-256: 2492fea2ea3a4cc722c28e8c06c958c33322fb83644467fd0d9755b4db038834
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and multiple external URIs, some pointing to raw IP addresses or compromised CMS uploads, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to deliver a phishing payload or further malware stages. The embedded JavaScript is likely responsible for initiating the download or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://140.121.180.103/ckfinder/userfiles/files/15915032304.pdf PDF link annotation
    • http://homeshopeez.com/uploaded_files/userfiles/files/94298019583.pdfIn PDF document text
    • http://belniig.by/public/file/jofunogidedogiraguduloku.pdfIn PDF document text
    • http://jongauger.com/userfiles/file/jujakazokixavolepimuke.pdfIn PDF document text
    • https://frutalmente.pt/site/upload/file/11875687448.pdfIn PDF document text
    • https://aep-tc.com/cache/fck_files/file/57208787031.pdfIn PDF document text
    • http://prosquash.by/data/68371334239.pdfIn PDF document text
    • http://umffz21.ru/admin/ckfinder/userfiles/files/75112282454.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/d2ab8a300d5c57709568495723602e8b/79234676445.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///60566108645.pdfIn PDF document text
    • http://hotel-ambassador-nice.com/upload/files/rizujivi.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/161448e5169d0f---71950149492.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/45061491569.pdfIn PDF document text
    • https://xn--nmqu14inmf.com/upload/files/85743659622.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/gevogakasovusegafame.pdfIn PDF document text
    • https://molecult.metallo-tests.ch/sites/web/upload/files/19069956687.pdfIn PDF document text
    • http://cuadepthanglong.com/images/ckeditor/files/62148388180.pdfIn PDF document text
    • https://mmtours.si/uploads/nimuz.pdfIn PDF document text
    • http://algarestofos.pnh.pt/js/ckfinder/userfiles/files/kesexemubusevepikekaj.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/60191263574.pdfIn PDF document text
    • https://tongdaidoanhnghiep.com/app/webroot/upload/files/5169344094.pdfIn PDF document text
    • http://bangladeshceramicsociety.com/uploads/editor/files/powelapuvuwekakop.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1615f2ad837f1c---92406612247.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/vItLtdF7Pec/uplcv?utm_term=manual+allocation+of+ip+addressPDF link annotation
    • http://pro.ovh.net/~tribuene/images/banque/file/40549426188.pdfIn PDF document text
    • 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_off000104b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B4 10704 bytes
SHA-256: 618f56759a28637aa618df451cd289474dcea32d14e93141945bb65a89e7fa91
font_01_sfnt_off00011d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001357a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1357A 18160 bytes
SHA-256: 73ce0353573a9d950a4aa4f63541730f93415d1dded6646861c941d8f5f6fa9b

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