Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee90032f01ad8c91…

MALICIOUS

PDF

81.1 KB Created: 2021-09-03 22:11:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f9574393d92214d511f15285c598df21 SHA-1: 93e12bba735135ebb6906ee7f4b5ccb09509773f SHA-256: ee90032f01ad8c911e27fb2ffc3054433dab8309ea7af64513a64036654d1ffb
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier, indicating malicious intent. Heuristics reveal it functions as a link farm, pointing to numerous compromised websites, likely to lure users into downloading further malware or submitting sensitive information. The embedded URLs and the PDF structure strongly suggest a phishing or malicious redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://simkoongschool.com/uploads/editer/files/lobopopuwovozo.pdf In PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/sd4bfvm0c1jqsr125hkcht7fa5/tenejazenotubipezezotuwog.pdfIn PDF document text
    • http://kxzyjy.com/CKEdit/upload/files/1212276277.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/c8r3a2vmrvd69f4s5nod4r1q2q/99349107211.pdfIn PDF document text
    • http://eraldocomo.it/userfiles/files/pabewixijavejufugidokaxaj.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/dadibolinitivoz.pdfIn PDF document text
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/54153065018.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a7446f0b2d9---45549184464.pdfIn PDF document text
    • http://vinabomi.com/uploads/userfiles/file/jijalebidunok.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607734f3e1292---xegegudevu.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/tawugitexuvaviwomopixodab.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/jokegopewibizor.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a342a168c59---95631854386.pdfIn PDF document text
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/28609680725.pdfIn PDF document text
    • http://acupunctuuryao.nl/ckfinder/userfiles/files/81796608316.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608522edd1851---nilonokitorewexajit.pdfIn PDF document text
    • http://vincitydata.com/uploads/ckfinder/files/pisaduderuzex.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/76f0c75d77194cfa22f93364c5baa198/87838856692.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/kifinegutusil.pdfIn PDF document text
    • http://bclgrouptt.com/userfiles/file/morovoru.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/18062116333.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611886c3b5659---naberolabarufika.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=pdf+reader+macbook+proPDF 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_off0000d882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD882 18260 bytes
SHA-256: 9685a4af5c3f0755a216a9fa68ac7877b3ab8c4da3177b4a1cec6bb27f820e52
font_01_sfnt_off000107ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC3 10508 bytes
SHA-256: fac9aa7e3b0186d58a681cca21c89cffb4710d11536cae675e9825bee88b37c7

Open this report in the interactive analyzer, or submit your own file for analysis.