Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab0ea14da39e345e…

MALICIOUS

PDF

80.5 KB Created: 2021-09-09 17:29:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9cb3655d29b7f4b2439869413c9d8b23 SHA-1: 71e2b3d2c0a4a35846f39e0f75688b5d727df687 SHA-256: ab0ea14da39e345ebf80d5e2fe55f9369e33c71ebfb7574612bbade7b7f583a9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs the user to copy and paste commands into a shell, likely to download and execute a secondary payload. Several URLs point to compromised WordPress sites hosting PDF files, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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 http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16131134f7eeec---77193284665.pdf In PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16130374ab2166---24994298638.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/90513122315.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16136ab4177222---wuvovexazuvimujigugikuwi.pdfIn PDF document text
    • http://flemingdecal.com/uploads/assets/file/befuzokojefawazos.pdfIn PDF document text
    • http://wxbeimei.cn/upload/ckimg/files/202109081522374497.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613954296f928---48486939944.pdfIn PDF document text
    • http://surestegc.org/documentos/file/80866062127.pdfIn PDF document text
    • http://matrix-corporation.com/upfiles/editor/files/kuwidulazofuxiru.pdfIn PDF document text
    • https://healthlantern.com/ckeditor/ckfinder/userfiles/files/karaxu.pdfIn PDF document text
    • http://pantipplaza.com/userfiles/file/xuwed.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed1f075d71---nupogevawiwowo.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/95549402925.pdfIn PDF document text
    • http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/kutaxupejatiwa.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/mozuwififoxupekisegoka.pdfIn PDF document text
    • http://curvesncontours.com/userfiles/file/jiguludejobesigijor.pdfIn PDF document text
    • http://hodori247.com/uploads/files/4376912485.pdfIn PDF document text
    • https://strings97.hu/userfiles/file/jimikotarasi.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/2064716498.pdfIn PDF document text
    • http://risme.vn/files/44536990869.pdfIn PDF document text
    • http://www.leasebridge.com/CKUPimg/files/zenimufazafosefofod.pdfIn PDF document text
    • http://recko.ru/ckfinder/userfiles/files/laxijedupupebupirimuzolez.pdfIn PDF document text
    • http://wuxihemei.com/ckfinder/userfiles/files/20210909_034804.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=create+iso+file+windows+7PDF link annotation
    • 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_off0000d70c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD70C 10516 bytes
SHA-256: a78060945435f92b708204e1af77267df7e667eef3e4a24a89530f370e7b958c
font_01_sfnt_off0000ef3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001074e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074E 17660 bytes
SHA-256: 5726bf6240272d8c9acc80f170c29b249de650e831b1eac074a916659e8150b7

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