Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed0a02a2eaa1133…

MALICIOUS

PDF

76.2 KB Created: 2021-09-30 20:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 77545c556b1a2388b084d4b9870768b1 SHA-1: 37c15f949e253d790b6cc3eb609845f3e39a064e SHA-256: 0ed0a02a2eaa1133ea8cd22c31528107cc6976f4af77f9ad755d744ccda2c8fa
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to disposable domains, suggesting a link farm designed to distribute further malicious content or phish users. The presence of embedded JavaScript is a common technique for exploiting PDF vulnerabilities or initiating malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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://wtmongolia.com/materials/file/nimuvevewamijopebuwetuwof.pdf In PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jidotusafigogazusures.pdfIn PDF document text
    • http://thechitay.com/uploads/userfiles/file/dixofomiratutejiretonil.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/161504f1e0f0db---duduwobutoginoxujabola.pdfIn PDF document text
    • http://morebricks.com/ckfinder/userfiles/files/51062621491.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/bikurivajawu.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/geneg.pdfIn PDF document text
    • https://hse.tw/upload/file/rogowuxafixodiwufugola.pdfIn PDF document text
    • https://ceramicasvillaflor.cl/UserFiles/File/9351615652.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/9654fc8656b5f232ce56b4ac0ab1cf34/7096869796.pdfIn PDF document text
    • http://mariancozma.com/_user/file/18382203726.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/lupuwawozuxizuwiwanefe.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/59485094241.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/20635038358.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/xekelovifilukuzipepe.pdfIn PDF document text
    • http://www.dagmarsvendova.cz/admin/js/ckfinder/userfiles/files/71600124052.pdfIn PDF document text
    • https://tramtron.vn/uploads/files/files/jebagaj.pdfIn PDF document text
    • https://cdmsig.com/ckfinder/userfiles/files/11635495281.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/161401ed943f86---23008043920.pdfIn PDF document text
    • http://firegallery.ru/img/upload/69511553344.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/veduzisixu.pdfIn PDF document text
    • http://hanstime.com/userData/board/file/xurukosotapuba.pdfIn PDF document text
    • http://simonkuehner.de/gfx/userfiles/files/vobepasamodegabu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=the+lankavatara+sutra+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_off0000c27a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC27A 18524 bytes
SHA-256: d202816bbaac49c7bc712658dae0c8f9af0a18193c9a69ad57c7e2bccc4c723a
font_01_sfnt_off0000f2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B9 10604 bytes
SHA-256: 50937d0dccb078fe192fee58dcd125d05ef17e0fbdf2a985d230d9505b5ca6a3
font_02_sfnt_off00010af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1