Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a29ad5dd66107eb…

MALICIOUS

PDF

75.1 KB Created: 2021-09-07 10:04:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5ff95a40a8f4a38a56a3b38959911a86 SHA-1: 5a4ad1a6a9dfa085357770b116ba41bc22794668 SHA-256: 0a29ad5dd66107eb0f35e2b1fbf178b6d47411f9505b4fe9940e676ffd487840
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to initiate malicious actions. The heuristics indicate that the PDF acts as a link farm, directing users to compromised WordPress upload storage and disposable hosting sites. These links likely lead to the download of further malicious content, consistent with a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • 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://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1430897f0---65168793044.pdf In PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/64508637305.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091ede0b7b7f---xukabejedegavigesapijid.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/galavififudiwitano.pdfIn PDF document text
    • https://liftsystems.ro/LiftFiles/file/6385581264.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160885e9e480a8---kamugin.pdfIn PDF document text
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72385011905.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102ae7535544---mivavekebobitunef.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/af55d1a9fa493827b1ca05424b7f50f8/lerazatufokojepewozix.pdfIn PDF document text
    • http://mxm-hosting.nl/img/editor/file/dejufadapur.pdfIn PDF document text
    • http://girc.ncue.edu.tw/ckfinder/ckfiles/files/48333340822.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/161234cb87219b---8836663232.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609f145f9a6a5---46125292672.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cdf9007f07---tokegekebapu.pdfIn PDF document text
    • http://sclifeguards.com/clients/16854/File/gizoruwumavimadebosapawu.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5dc70e7d51---60410847111.pdfIn PDF document text
    • http://luatsugiadinhviet.com/upload/ck/files/4036136317.pdfIn PDF document text
    • http://bakefruit.com/uploads/files/202108182322108387.pdfIn PDF document text
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/72255732218.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a146760c57a---66506677594.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/mirofexajinevub.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/972887546.pdfIn PDF document text
    • http://vietsinphar.com/uploads/files/kuvijolekuxupul.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/96760705803.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=euglena+locomotion+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_off0000c5a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A7 15992 bytes
SHA-256: f2e55731de2fb8d1a4ffa53323e26cd9323cc9c8b43d048ed1c2b530dfd971ea
font_01_sfnt_off0000eea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA5 10776 bytes
SHA-256: 9ce20184424849702a860768ecd2d66f03b58f4ef362383dccd0a254190a72f9
font_02_sfnt_off00010732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10732 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1