Malicious PDF — malware analysis report

Static analysis result for SHA-256 4db10654bd90122e…

MALICIOUS

PDF

147.3 KB Created: 2021-09-07 01:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: a4a6f1683d0a28b949cdd162153fd958 SHA-1: 14ff2c5c93acb39d07eec2c02ad89922e8bb5db2 SHA-256: 4db10654bd90122e534f07a23aa054f40192bd440791cbfd9b3088417ddc19f6
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' suggests the document instructs users to copy and paste content into a command-line interface, a common tactic for executing malicious code. The presence of numerous external URLs, many pointing to compromised CMS upload directories or disposable hosting, further supports a phishing or malware distribution scheme. While no scripts were directly extracted, the overall behavior points to a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9761

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://signexpowholesale.com/project-new/christianbook/upload_images/file/lawaferovilefopiz.pdf In PDF document text
    • https://www.hasmow.com.au/application/third_party/ckfinder/userfiles/files/95592074436.pdfIn PDF document text
    • http://csc0532.com/userfiles/file/20210705233020_ww6yzx.pdfIn PDF document text
    • http://vanphongphamhienluong.com/upload/files/wojajisimujolibud.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/40861723627.pdfIn PDF document text
    • http://qca.ch/userfiles/file/2884027011.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7a13239ab---keloxegariko.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdadc7d4cfa---giwirekamivinugev.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/b681ba6d9fdf205bfac42283cefed8ca/56112687955.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/adfb0d14a12e791a380ec1480825ba84/vedakupekufonuziwipebis.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16081ba1e37ad2---naferujajujiki.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084bdf3196b8---zorexegiwiwo.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/95821147103.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/70963059658.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/renovipowepamij.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/72b08c5e84b4510d6fc7d1b3f444be72/8672541131.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160adb74515857---gozovogawejisa.pdfIn PDF document text
    • https://delphin-bau.com/ckfinder/upload/files/tamonozuno.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16082488b06ed1---rutobipomulufemajisenera.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/3eed2cd2c05c653903eea4b4b6cd2c8a/zovejubosop.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087ee7f5434f---89949684374.pdfIn PDF document text
    • http://gardnersunited.com/clients/e/eb/eb3320446930dd457027df34457c622b/File/24157346321.pdfIn PDF document text
    • http://gokea.org/upload/editor/files/vorekedajananarozetubowe.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/e1b6547e5bffac7087055fdaf78192cb/90907109558.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/45410487334.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/vamizadilarakexu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=docker+advanced+tutorial+pdfPDF 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_off0001da50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DA50 19684 bytes
SHA-256: b3545ac68912d0eacdef88a66b9b3e9272374dd04736a5d8d5deaf9af916f9c3
font_01_sfnt_off00020e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20E39 10704 bytes
SHA-256: 5a7038964a11e3230ba40fb9961e2b2919c81597297e17005928310528467f41
font_02_sfnt_off000226e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x226E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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