Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f880ea8e936383b…

MALICIOUS

PDF

81.1 KB Created: 2021-09-02 14:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 03d3e6d651bc4e303a191134a1ba8f37 SHA-1: 1c218e66329ed41a3a96e3f7c1b65233b1eaab77 SHA-256: 0f880ea8e936383bf62150198128fdafa62d805875ee201a04c7e84a4d1068d1
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to exploit vulnerabilities or deliver further malware. No scripts were extracted, but the structure and URL analysis point to a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 http://maihome.hu/admin1/file/76474472820.pdf In PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/70211829974.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/2257c108a02990e54847f2ef42b1ac34/lubizogexulewenapulad.pdfIn PDF document text
    • https://peiitw.com/Upload/ckeditor/files/gifojatenuriko.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/8d3c2e9cde830bad0f4f5f59f1021bed/88616912506.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/88cc54d8538f1fdd1d2838db3c71f8a3/pilesenananufodifotimifu.pdfIn PDF document text
    • http://pyroglobal.sk/app/webroot/files/userfiles/files/kijugeje.pdfIn PDF document text
    • http://www.oomedia.com.tw/ckfinder/userfiles/files/viravotidopilofugowogur.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d43a71941c3---65597726530.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/wotezujafilafux.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/let8ouirvhsjtl66regarqp11j/febexupediruj.pdfIn PDF document text
    • http://jornalespacoaberto.com/app/webroot/datafiles/editor/files/xiwowizigijivokazabovo.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/66267308466.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/42936516540.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210722083735_718326941.pdfIn PDF document text
    • https://clubsportedinburgh.org/userfiles/files/18664481850.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/aankvhd2js3l14ms741simqm3v/28622888307.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/27475538798.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/9911a3e2e3377855ce86fb8a14525f5b/77413131066.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bee1ffbc911---nopawukol.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160800567c6145---57429039645.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/88061832518.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091ac441d3df---suzurelezojis.pdfIn PDF document text
    • https://budgetparking.ca/admin/uploads/file/88800692667.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893ab8d518e---7263927662.pdfIn PDF document text
    • http://paynechapelduquesne.org/clients/9/9b/9b910c66cef3ae2d1bb1fd5804160a19/File/79022060636.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=copernicus+theory+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_off0000dbef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF406 10752 bytes
SHA-256: 1b6634c26ce1db65c6515d0ed6d763b1ce32e67596c1a9dadcc77d28b7f504ea
font_02_sfnt_off00010cba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBA 16368 bytes
SHA-256: b488418607561040a9f744de3f55f4aa4265d0c9e913ab47f26be7f50b21386b

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