Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a7f94c41498c037…

MALICIOUS

PDF

84.5 KB Created: 2021-09-19 11:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0d1ec27259d29489a0ade1c022a5256e SHA-1: 6a88b727fbef429e6112e63cd2d7e9f8781d5447 SHA-256: 2a7f94c41498c037c8fa69017d0ffbe16283d593857b81da92f5a031fe5097b9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which are hosted on compromised or disposable domains, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://irlanc.ru/uplcv?utm_term=2009+gtr+for+sale PDF link annotation
    • http://pastadimatteo.com/ckfinder/userfiles/files/99432652129.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/161310606769ce---56975711289.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zejolakajemugokokotozi.pdfIn PDF document text
    • https://tomorrowhubs.com/upload/users/files/wuforalabidima.pdfIn PDF document text
    • https://trouver-une-ssii.com/img/pics/files/67201835834.pdfIn PDF document text
    • https://soccerauquebec.com/userfiles/file/9278036330.pdfIn PDF document text
    • http://kleinschadenexperte.com/userfiles/file/ginavujubajupo.pdfIn PDF document text
    • http://daieimotors.com/js/upload/files/21324840622.pdfIn PDF document text
    • http://coquicart.com/ckeditor/ckfinder/core/connector/php/uploads/files/59914873244.pdfIn PDF document text
    • http://supair-lux.hu/ckfinder/userfiles/files/54328186265.pdfIn PDF document text
    • https://parvazyab.com/basefile/api203/files/7980087473.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/89149440708.pdfIn PDF document text
    • http://t-cso.com/upload/file_folder/file/39358721232.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/59400528357.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16131b1f35c0c6---mepozawuzunovadapaxanimik.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/cb9d24f5fcf04f100677971e742ad4d6/nonupuvolusetu.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210919_092451.pdfIn PDF document text
    • https://anjingliar2.com/contents/files/78977978093.pdfIn PDF document text
    • http://etcpremium.com/userfiles/files/87672584473.pdfIn PDF document text
    • http://gkz-crimea.ru/userfiles/file/vipamoxevesuti.pdfIn PDF document text
    • https://kitapkapla.com/upload/ckfinder/files/rimumowitudiwipow.pdfIn PDF document text
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pejulukopuwuruwasiku.pdfIn PDF document text
    • http://pfmconsulting.org/survey/userfiles/files/gewigunolosarutan.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/19061188793.pdfIn PDF document text
    • http://usefchina.com/uploadfile/file///2021091519530167.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_off0000e45b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45B 10508 bytes
SHA-256: 965fbb32346d4cfc75b38f4d802c61c9ab7eb2240e2580f0949930f500f5d752
font_01_sfnt_off0000fc7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001148e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1148E 18236 bytes
SHA-256: 081b52e999e23146a3828b12384d6c57b61f23f9fba07fef2fd77ca219de1bdd