Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2e0d204425edbe…

MALICIOUS

PDF

79.5 KB Created: 2021-08-27 17:27:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a5e00e04cdd1eb7e5b880f50579df27c SHA-1: d58aaa34c50d99fc4bd8566a304d2e1237523745 SHA-256: ab2e0d204425edbe21a0c9ae22ddbe61faae9a5fdd10b37c02f5751f4ec30c82
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier with high confidence. Heuristics indicate it functions as a link farm, pointing to numerous compromised WordPress upload storage locations and disposable hosting sites. These links are likely used to redirect users to malicious content, fitting the pattern of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=thermostat+troubleshooting+house PDF link annotation
    • http://calisnt.com/uploads/files/15579137811.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/19272957184.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a01c87eb3---66720067931.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/wakoxuj.pdfIn PDF document text
    • http://www.farmaciavictoriayjmleon.com/userfiles/files/vatukijedakigekov.pdfIn PDF document text
    • http://glttek.com/userfiles/file/tojubok.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/lidivirujugode.pdfIn PDF document text
    • http://orsolyajuhasz.com/ckfinder/userfiles/files/wavuwazodoxuvixexopo.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/fc80b0ad181d3a174592a86d6c20e285/dipuwoniti.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bdcb88ed450---gilogewureseberizejit.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/duiaj2i59dc03nnikhn08rff86/japujifasojudematosozeki.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4aa8c57e9c---wetabemuvagokibomev.pdfIn PDF document text
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/42929633440.pdfIn PDF document text
    • https://mintowncoffee.net/uploads/images/files/43070851498.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611f202004c6c---dajataronib.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/72260c626086ba7f2c8d85d0c79d2136/39910060412.pdfIn PDF document text
    • http://email-database.info/userfiles/file/35146615877.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beaa427ed26---diderasijabitipodomita.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/7748012af2952db73fa05432aa65e14f/xotujat.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/19354911410.pdfIn PDF document text
    • https://basisnomor.com/contents/files/22092937044.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_off0000d1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D4 17760 bytes
SHA-256: da4d02d015c3ca08f429f66c502680c6463661d127faf192dd74b671b3addb5b
font_01_sfnt_off0000fee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE3 10756 bytes
SHA-256: 9c7dc46c85511faf32d56c7df8986e3cdeed19c3cb89f4863d87bbce05750825
font_02_sfnt_off00011773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11773 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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