Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3910c352ed78789…

MALICIOUS

PDF

86.1 KB Created: 2021-06-28 18:14:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 5331f3b0394aa3f6788927dfc34f2241 SHA-1: 179311702193db0e4e4f8143ae391b9ab8bed04c SHA-256: e3910c352ed78789548c199dac78b98ba1d5a230a71ba8cf8cb4dedeb6269928
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV and an ML classifier as malicious. It contains numerous links pointing to compromised WordPress sites, suggesting it is part of a phishing or malware distribution campaign. No scripts were extracted, but 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 0.9952

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://wastran.ru/uplcv?utm_term=attaching+jump+leads PDF link annotation
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ce4bb5739---10958773169.pdfIn PDF document text
    • http://wsystem.sk/userfiles/files/notanamatokesaluji.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/rorodepuri.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/7051cdbb067df2e890c0b0db13a2d7f1/kenoxawetogegikolesow.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/0551bef8609cd15b6f9e1709fab264da/temixigozalabidodefatadis.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/a5e0736c58c3873fa1f581d3f24946f6/nimuwegipedefi.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/18917185807.pdfIn PDF document text
    • https://mmszke.hu/files/file/87174631238.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160715d1ea526e---28693763663.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/693d84ff9a5785cf12fe69a3e7fe1a83/12965074185.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/tfknk47q2i2vb4u5mhe4ngjqp2/61761150253.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160857562c460c---duxodonida.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/3tr30ielmsd175d9riugv8e6l3/56003266510.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/298b19f4ecf447ae4a2fffcade20e66f/92292030549.pdfIn PDF document text
    • https://anfauglir.com/images/file/zijofamubigi.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/fubexov.pdfIn PDF document text
    • https://ntwbearing.com/UserFiles/File/63612225668.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/ee458e71b5bde301a41f524b6af9a23c/52198264959.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/9152681908.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d8731afb0---misusagaxojuluxakuzeg.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160a8391c44c1d---18476030588.pdfIn PDF document text
    • https://sayurhijau.com/contents//files/begafalatozimojoze.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/pogivoxosiwifeb.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_off0000ef79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF79 10952 bytes
SHA-256: cc507462a191df5274e6050f531366f6e5b962da0fa1d52eb22ff3aa9a0a5d53
font_01_sfnt_off0001087a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087A 16388 bytes
SHA-256: 59ccd8140abf62c3d465a77899c92ec0427d768a1a5be90bb508eaf6e3e39f92
font_02_sfnt_off00013307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13307 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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