Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec9fec4e015f0362…

MALICIOUS

PDF

84.7 KB Created: 2021-09-09 20:07:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7c596fe1bcbd612de2ee3efaa3ffbfde SHA-1: a3b362ad30d309f369a68590c9eed1cf3e4f572a SHA-256: ec9fec4e015f03627affb8e6fe92dd414268bb386ff4d8fea860fdc5921bce4d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous embedded URLs pointing to potentially compromised websites and disposable hosting, suggesting an attempt to lure users to malicious content. The presence of 'SE_LOLBIN_RUN_COMMAND' heuristic indicates suspicious command-like sequences within the document text, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://showdetango.com/bafa/userfiles/file/61415598077.pdf In PDF document text
    • http://fsgpj.com/upfolder/e/files/20210909155245.pdfIn PDF document text
    • https://magatek.com/documents/file/93046747358.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/wobudutalosafomopefov.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/sejazixogarajevopezujat.pdfIn PDF document text
    • https://adikkeempat.com/contents/files/rujezubuv.pdfIn PDF document text
    • https://demetraproject.eu/ckfinder/userfiles/files/tudokasiri.pdfIn macro / runtime command snippet
    • http://aardbeienfeesten.nl/uploadimages/files/24401680550.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/2f95d2fc6b48c56d8d839994950774e5/47854273121.pdfIn PDF document text
    • http://bulmarconsult.com/files/xafilapu.pdfIn PDF document text
    • http://luligang.com/ckfinder/userfiles/files/metibavoxigilun.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/rejofizujebolilijijusunot.pdfIn PDF document text
    • https://ciar.vn/uploads/image/files/sesorito.pdfIn PDF document text
    • https://lighthousemacau.com/html_upload/file/9579794181.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/redajenuximapav.pdfIn PDF document text
    • http://greenbiotech.vn/uploads/userfiles/file/16606489486.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16135f7f040aa0---nakebijara.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/15581303584.pdfIn PDF document text
    • http://yourtruck.be/upload/ckeditor/file/17529466552.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20210909194715.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/b6eb4c6821181518ce132ebe8c4a9372/wuleseremusarinugataxurob.pdfIn PDF document text
    • https://pragatitic.org/ckfinder/userfiles/files/vusozaz.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-9-1/20210901210131679353.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/161392fb044d63---483155634.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=viewpager+inside+scrollview+not+scrollingPDF 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_off0000e15e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15E 10812 bytes
SHA-256: ca2c9531a6ba9559b067ae6fe64fd74fbf3958a5ed8d3b9211a2cfca5e3ab527
font_01_sfnt_off0000fa47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA47 19300 bytes
SHA-256: dd8f63ecca8b437f18e2f1a47eb8fce6aea347f35195a781af22d010816dff0f
font_02_sfnt_off00012d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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