Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7c4d6d0bba1b87…

MALICIOUS

PDF

75.5 KB Created: 2021-09-03 20:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c70e29425e65380c7f2e7368961ca900 SHA-1: c6c98bd241bbc61c7167ab217bd20c7c53f4a159 SHA-256: 0e7c4d6d0bba1b87a7bd7e11ea1e4cdc4ebd1a0413399bc684041bb97a77b86b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a large number of embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://wastran.ru/uplcv?utm_term=cpe+word+formation+exercises+pdf PDF link annotation
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/384aa9102789c989a2851b21dbd2e595/terijekuwegaxutaxaten.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/iesmlekvut2ahkq0l1pmj5gai1/zuwado.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/tigeje.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/b11c41a89333fdbe18c9775ae6c47c4c/66883363072.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/h0514kf3acg665an4dad3us5as/79479067154.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/44bb43263da8e1014c175a9d9730838b/vonazekonojoz.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/gunugosa.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/96b8eeb704ba629ec9c408a09024be0f/52823200551.pdfIn PDF document text
    • http://autokolcsonzoszolnok.hu/admin/fck_upload/file/10442160882.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/ft6ma0s6pgfutia8692m8a7e22/24340510226.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/61d0352f4f0f3b84a11949a6750c8593/52894179158.pdfIn PDF document text
    • http://nktrading.qa/file/files/nukopuwaminuv.pdfIn PDF document text
    • http://idcla.net/upload/files/rajugojola.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/161197cfc9db65---19426707548.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/farutozigefakepekuw.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/hpr3rjsigaone103n2qfki5i3e/45239655139.pdfIn PDF document text
    • http://beateromer.com/bilder/file/risexanoxikedolesevo.pdfIn PDF document text
    • https://www.vignolaweb.it/ckfinder/userfiles/files/48830365950.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/bojeto.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/5379078374.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100fe352507a---41946939456.pdfIn PDF document text
    • http://nakajima-ya.com/upload/save_image/files/73992164882.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/11799802550.pdfIn PDF document text
    • https://rh-h1tapi-turbo.com/contents//files/50275815388.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/4399108004.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_off0000c2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0F 16916 bytes
SHA-256: 99c7bdff33e364c03813f69f04b7009ffac8251bec0ca977c5af309b2ce697de
font_02_sfnt_off0001066f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066F 10956 bytes
SHA-256: 8331d4d8b65ecc845464464b6b57dabe4b0e1eccb5d8692cacbeb7196d9d8d25

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