Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a0d25484a0b53b3…

MALICIOUS

PDF

75.0 KB Created: 2021-10-02 11:14:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b21adedd2c83b9c03293f1ad2606914b SHA-1: 85e09f4bb857ad69239af551ef4b9899451a40d2 SHA-256: 9a0d25484a0b53b311d02c4765fe23c6cf34cfbd6f3e30f9d05a3b5153aba4c1
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable hosting or compromised CMS upload directories, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • 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://playbabydoll.com/userfiles/file/71963276224.pdf In PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/221af55fd5af499b39ab465bc96854de/97914733528.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/64481193061.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/pepiki.pdfIn PDF document text
    • https://almudenafernandez.co/ckfinder/userfiles/Files/wutirisixinegugoposozip.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/vq9s2cmoijtchr3l2bq2jlj611/58976744318.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/67efe13d8a55acd126dcd8690ab92888/jafisuriwijorekoxigaf.pdfIn PDF document text
    • https://holcom-wd.com/webroot/img/files/24042072715.pdfIn PDF document text
    • http://phutungquanghieu.com/app/webroot/files/ckfinder/files/tirivufelakata.pdfIn PDF document text
    • https://contabilidadegoncalves.com/fotosempresa/files/mavilenesamo.pdfIn PDF document text
    • https://elmaga.lt/components/com_mijoshop/opencart/image/data/files/nuzugozada.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615809765b4c3---jasanufubegapovaloxikuke.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1614c9aef6e916---vititaxefadupatikoxola.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/zebemoxidonawepexenu.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/jarupovegijoturefife.pdfIn PDF document text
    • https://rrr71.ru/upload_picture/redaveluvejutobikivuza.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/51867865820.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210925230236.pdfIn PDF document text
    • http://astmasme.com/userData/board/file/8632156941.pdfIn PDF document text
    • https://hosrem.org.vn/ckfinder/userfiles/files/lulovapufowewegixezavome.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/742f599eb96fb888bf026c347ef68213/77959025434.pdfIn PDF document text
    • https://francemonde.news/UserFiles/file/41837522248.pdfIn PDF document text
    • https://kermanrooz.com/img/files/28248000072.pdfIn PDF document text
    • http://hotelbasantresidency.com/uploads/saxoguzenozego.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/73468892502.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=i+am+crucified+with+christPDF 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_off0000bfc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFC0 17928 bytes
SHA-256: 9f8529a4855a4a650dc561be3c3f05f72ba52d50ba58ddbea45ca0d7dd1994df
font_01_sfnt_off0000ee0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10622 10608 bytes
SHA-256: 88f3242148ebcc1027f981693b67836dc8d0312e7b4220ad399d64aeacb54a0b