Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2004a42df1d0a96…

MALICIOUS

PDF

99.0 KB Created: 2021-08-02 11:41:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: a47f2220c4816530c5115adbb3f84f5a SHA-1: 9365bccbd9b10de4531b36f93f08ff8eb0fbbc86 SHA-256: b2004a42df1d0a967b83220aea5864c77e3368a4af07c021d97d6003807f4282
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations. The primary attack pattern involves luring users to click these links, potentially leading to further compromise or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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://allytemp.ru/uplcv?utm_term=which+event+resolves+the+conflict+between+antigone+and+creon PDF link annotation
    • http://www.sport-konyv.hu/userfiles/file/37092953543.pdfIn PDF document text
    • https://fotoprint.lv/downloads/file/kosaruzusopobajowif.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021052915172055.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160e4e3448c22e---pexadevuxutufuxuwejuk.pdfIn PDF document text
    • https://tahubunting1.com/contents//files/mibomod.pdfIn PDF document text
    • http://tuhs1970.com/clients/a/ac/acc339db084e87cdfae31a76a6c96f1c/File/faromorebidalowonedujem.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/buboretirisifot.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16075e905354d0---tuzikudepofavanozazapexux.pdfIn PDF document text
    • https://www.babetravelling.com/ckfinder/userfiles2/files/ginaxetiwoxunalodor.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/2d68c57abc6f5aacab3b95bc963a7ae1/denadipejijuxuxogosedelat.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/migoma.pdfIn PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/99873914910.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/lokodafuzugaf.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b28b0e6e74b---13269951988.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/69305883920.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adeab77e2b3---lanedodazatosusawelovube.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a061c80a5a4---turujiti.pdfIn PDF document text
    • http://autoscuolepintozzi.it/userfiles/files/somufulafetivibipuviwadun.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210716190010.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b467bc977---52425810070.pdfIn PDF document text
    • http://fosterfreezesantarosa.com/uploads/files/bolijoko.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/xudilixir.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609585d337d9d---4715669171.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/zobisuvokakemi.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d66984a5e---82721934082.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/85313471ee93fa59e6684915c6c0eb71/dotaxaxavasiv.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/5fea9ddeb3128a050d52633fdf582554/getegalujewezijoz.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_off00010ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000124f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F3 25488 bytes
SHA-256: 433573ba1776d85406495b5db65bdacdecc4e4ba7b3d9c6199790a86f99be0cd
font_02_sfnt_off000160fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160FD 11040 bytes
SHA-256: d80db8b73e98adba7e71470215f2031a29ad65bc1798cd283769bcdf1336f535

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