Malicious PDF — malware analysis report

Static analysis result for SHA-256 2862afd305be003d…

MALICIOUS

PDF

76.4 KB Created: 2021-09-13 19:20:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: af0daea4f87157d1fad61d093eea497c SHA-1: 64038a32028fd1f4cdd012d3dda8e5a074782b04 SHA-256: 2862afd305be003ddd816e9e0d17d7972000f4ad40175911dfcc84871c2d6506
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm with numerous external URLs, many pointing to compromised or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the links and the PDF structure suggest it may exploit PDF vulnerabilities or lead to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://tonere.shop/app/webroot/files/userfiles/files/28010050032.pdf In PDF document text
    • http://ippinnudon.com/uploads/files/favizuxuxinap.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/27290075639.pdfIn PDF document text
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/40538863475.pdfIn PDF document text
    • http://akcihlar.cz/userfiles/file/kutipokelogovewatofez.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/jajuxaxowuvalo.pdfIn PDF document text
    • http://boxshop.mn/userfiles/files/95437350645.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/0f5eb1af4a6d9a44bac58633403de083/87074555566.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/3594681597.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16131a6086d2ba---10297858680.pdfIn PDF document text
    • http://www.lasallelille.com/admin/ckfinder/userfiles/files/vewuvujevixevokudusul.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/wuxoxadabili.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/satabimokisowekux.pdfIn PDF document text
    • http://licausi.it/userfiles/files/20898420024.pdfIn PDF document text
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/5915848607.pdfIn PDF document text
    • http://travelspace.pl/userfiles/file/zegiwosamixizejosifu.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e196d4bf4d---viladenoz.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210913220928316.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///xexapatagenosit.pdfIn PDF document text
    • http://www.77ice.com/upload/files/41703915617.pdfIn PDF document text
    • http://jl-vacuum.com/upload/files/66892330761.pdfIn PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/75278175652.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=western+civilization+beyond+boundaries+7th+edition+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_off0000c398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC398 17648 bytes
SHA-256: 6318772f6b3d7b5f3b50bcd8bd4fc3a806be0a52539a4562f6b0a9166ea91486
font_01_sfnt_off0000f10d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10D 11240 bytes
SHA-256: 62e866d9b25aed01343fd838113cf041b36b7c604637157082c6033bb6e5e865
font_02_sfnt_off00010b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1