Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0d5a458d1a21e9b…

MALICIOUS

PDF

89.7 KB Created: 2021-07-21 22:09:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0d1b0d4dbd474f691767074de01cc4a9 SHA-1: 7ea00ce73ceb86a75b772b595b556f216e3a4b4a SHA-256: a0d5a458d1a21e9bd3e045b1ba656a4207d92e81ce3e1f062fb16a83516b3135
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant portion pointing to websites hosted on compromised CMS platforms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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 http://riskhedgetech.com/uploaded/file/40679109860a7f58c03f45.pdf In PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607b376dbb670---zubiloliwonagebe.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/95351252076.pdfIn PDF document text
    • http://aweibel.com/Photo/file/59872608918.pdfIn PDF document text
    • http://thibangoto.com/app/webroot/uploads/files/35618356335.pdfIn PDF document text
    • http://thehigh86.com/clients/13680/File/putizasix.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b171d3ca678---nagekitanelupetabasu.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a785760e29d---62540970669.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/xiwujavem.pdfIn PDF document text
    • http://iphysiology.ru/upload/rimoradirososor.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/xuxop.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609c826a35645---11282048330.pdfIn PDF document text
    • https://highrise.pl/file/falezikakuxejomobefisonel.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f24f00627---16572798062.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/9d68472489f6fdc125c6627d13289a6d/54097596551.pdfIn PDF document text
    • https://termoformat.md/img/files/90481992348.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160914c405b510---rodabakisonelifakuve.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bcdfed28c16---62343536234.pdfIn PDF document text
    • http://starinviter.com/ckimagefiles/nesiduzojififoposinizij.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5adb9113b---bejowakupojunajubos.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160718c94bfeb0---ruguwoda.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/nopedadofap.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/dad8a9d73ba3914b5f7c01787065f8a8/ronusufijejizufedinugiju.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/95316835400.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/kulukekekopajidutubagujo.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/96375784463.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=bdo+how+to+level+fishing+fastPDF 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_off0000ecef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10501 28776 bytes
SHA-256: 927d67849355fb88514e1ac20d3a46d2fa00ab3a019aa72ef65c7741bd55d207
font_02_sfnt_off00013ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ED4 10736 bytes
SHA-256: be99cfbbb8d4877fb8632d0cef7d6fbdcebcfba5c591bf028a90106ac3975f80