Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ef05d4a3792ad1…

MALICIOUS

PDF

84.0 KB Created: 2021-07-29 17:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3dc5cbe97793a9cf52a24170cb15ab73 SHA-1: 057a0f462c2b219534a5fa04d7fdafd805cfc45a SHA-256: 02ef05d4a3792ad13a80eb816ad09cc908a91bcb6c32b7b559c43e52736f036f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://medvor.ru/uplcv?utm_term=tecnicas+e+instrumentos+para+recopilar+informacion PDF link annotation
    • http://ises.ca/phpsites/vertical_living/uploads/file/54932464218.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7fe714a3e3---tufimumojisutirotok.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f0010c3ffb7---11475324438.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c6c5295d5---dadugirezixova.pdfIn PDF document text
    • http://dataction.org/demo/dataction/media/losixisofixabifara.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b8145280f0f---36020389655.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be511e39a64---riwipuzufezefudebirimabe.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/44063113003.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/dabcea8434f0789bac5d6b22efee7d8f/tixolud.pdfIn PDF document text
    • https://cooperspick.com/files/xewerug.pdfIn PDF document text
    • https://armenia4d.com/contents//files/faraser.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-7-28/20210728103434775364.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607d35db441fd---49926493463.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/nozixolepejaziwijok.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/gurezupopapufexedurumo.pdfIn PDF document text
    • http://perfekttorun.pl/pliki/91130410332.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20210715223024.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5829394f80---67592247550.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/tobovenozevidunulazutigif.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d53a963621---vosawuloxijagog.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/b2f3eb772bf4fc36a8e73ffb12b979e6/1038747071.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/09263129e9ad7c8852c2906f614f30f8/besiporiko.pdfIn PDF document text
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/1f0bnfj978ip38me2a16lrafb1/69439376958.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/7511947676.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_off0000e636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE636 16920 bytes
SHA-256: 96879f57e16218c64c6278039c6c823efb268ee72227169fcf02514c42f2d613
font_01_sfnt_off00011007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11007 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001281e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1281E 10704 bytes
SHA-256: 164a8a09a7549c16dbd293b9adc240d0107b83726e80eec393b872875d141160

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