Malicious PDF — malware analysis report

Static analysis result for SHA-256 eafa2b87d2de6aab…

MALICIOUS

PDF

82.3 KB Created: 2021-09-03 07:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6b75b8c0c57af6433e365d037897ea92 SHA-1: ad74a7300ac01b185ba6021de1f5cb60ed75e69c SHA-256: eafa2b87d2de6aabd36628ca1f31c1175ae36667f78b9ea7b042dc54b1b03654
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, indicating the PDF's primary function is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://pixomot.ru/uplcv?utm_term=your+quantum+breakthrough+code+pdf PDF link annotation
    • http://childconnect.com/swi/fckfiles//file/44381948151.pdfIn PDF document text
    • http://intproplaw.com/admin/uploads/file/nonek.pdfIn PDF document text
    • https://soroptimist.be/oldsite/intranet/ckeditor/ckfinder/userfiles/images//files/beretazidamuzi.pdfIn PDF document text
    • http://cuuhoatudong.com/upload/files/libedere.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094aa58330f1---zopufozaxasabomodovokikep.pdfIn PDF document text
    • https://nilsahost.com/calisma2/files/uploads/tubunarijugunedazifanufev.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607262bfbe833---wujezafabamos.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/xafasowikovulofufu.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/b285f5dab940bef770835e243f107674/68513695426.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160723bd836748---wevofipa.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e4235fca9---rinabewawilikinol.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/rusowenodug.pdfIn PDF document text
    • http://nuovojob.com/userfiles/files/xugedoperupovufogexe.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/98311939801.pdfIn PDF document text
    • https://susta.vn/userfiles/file/numuwiredirupawo.pdfIn PDF document text
    • http://prtourusa.com/FileData/ckfinder/files/20210714_C0D5DD5B6B50D13A.pdfIn PDF document text
    • http://kassa.pl/userfiles/file/kajaxowisosafupif.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/k4tv3q906jbdfebeog1s3tg0rd/78108715879.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/mebodularoraxoveku.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846dda6b5b1---zawatadijazuwumuw.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612178f3aed55---kazenubom.pdfIn PDF document text
    • http://anupbolivia.com/images/files/tavakegejevajifoxor.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/b338210aa5b727792d435bd6f239a261/67676369317.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_off0000dcfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFA 11224 bytes
SHA-256: e79482f827668728b92f210f7f819f6cd3c0f907acaa8aceec65bdb150aaede4
font_01_sfnt_off0000f662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF662 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E74 17356 bytes
SHA-256: 1c6bf2176d6eb97fb8535f188149ef1f33ab4d47af527d545df671aae7f73b71

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