Malicious PDF — malware analysis report

Static analysis result for SHA-256 01fc7d622cc58800…

MALICIOUS

PDF

82.6 KB Created: 2021-09-02 03:12:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9f9ac47bfbae0cd093eeed7bac9d6cd9 SHA-1: a6e1b18b9b0bf1a114d2a617a64466718609f2ad SHA-256: 01fc7d622cc5880044a898910d5e81f4660bd6e63958e38feeed03619e7550fe
156 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains numerous external URIs and links pointing to compromised CMS upload storage and disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://drafthe.ru/uplcv?utm_term=what+does+omnivore+mean PDF link annotation
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c28acb9bcd7---46521757257.pdfIn PDF document text
    • http://buyyoutubelikes.com/ci/userfiles/files/52526590784.pdfIn PDF document text
    • http://amicalelaique-guyancourt.fr/ckfinder/userfiles/files/28399618246.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/be404bea4c592a28c451d30f05bd1110/76916771953.pdfIn PDF document text
    • https://euro-m.si/web/dokumenti/file/sugopefaloraxekige.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/7dc1e799854ae58937049ab4c5ab8d18/vifog.pdfIn PDF document text
    • http://ipublicity.cz/data/file/doxinifitanazag.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/29971033726.pdfIn PDF document text
    • https://123natura.com/stockages/files/77648130513.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/1c56610addd83d96e1ba9ab16b916cdd/ziwadum.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/d5cc8913f3f249848e9e53fbc5d838fb/39472486526.pdfIn PDF document text
    • http://englishkan.net/UserFiles/File/ruburitumazadusubo.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/sobukunituxofimogarexewa.pdfIn PDF document text
    • https://easypayindia.in/userfiles/file/46094719897.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d5b3a4193---ronemaxasadepujeposowin.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cf2a72072b6---50389369946.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/fm80j7q14qslic1q0ibgd3eg0u/vabeg.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/da9bbb1e24f17b9a75d13dd5356128bd/womalajuvuzibenozizol.pdfIn PDF document text
    • http://www.armstrongre.com/files/files/36564048799.pdfIn PDF document text
    • https://drsaman.com/files/pibupalegalumekixapenu.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b989ad997c3---wepofetutaxovasos.pdfIn PDF document text
    • http://eotp.info/sites/default/files/fck/file/wivunos.pdfIn PDF document text
    • http://chipgene.com/image/files/20210807_150409.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/569306aa715dcbc4dd251b26460fe2a4/pinuwefuviga.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_off0000dec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D9 18168 bytes
SHA-256: 74aec5d9111a3a800e6c6e6901f4c818fbfe33271946deaaa9970de46ee3cebf
font_02_sfnt_off0001255f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1255F 10524 bytes
SHA-256: 0c68c16fab18d35620b9cdf6500dc72d37b80378f2d56705da8f4c8d93dd0b4f

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