Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa03ac7fcabb6cc1…

MALICIOUS

PDF

70.5 KB Created: 2021-09-07 15:56:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d240a7786dc74132051820cb5f4f5021 SHA-1: 3796c4421bc574f75f161b578a87f600f22a8427 SHA-256: fa03ac7fcabb6cc1adf4044279a52207cfed11d3f8a8bd5b2df75d4f25e68f85
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF contains embedded JavaScript and numerous external links, many pointing to disposable hosting or compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. The presence of embedded JavaScript suggests an attempt to exploit vulnerabilities or execute malicious code upon opening.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://work4shop.cz/userfiles/file/salejanabodofukisiwoj.pdf In PDF document text
    • http://dnepropress.net/files/file/jetarejagavonazomefep.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/9297312384.pdfIn PDF document text
    • http://thevale.us/userimages/606283532.pdfIn PDF document text
    • http://zopos.zohukum.com/ckfinder/userfiles/files/93984228296.pdfIn PDF document text
    • http://owv-sad.de/userfiles/files/wanonusive.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/tgt24th57vri7tl4fsk5luvr21/rijis.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff6ca428d8---pubomaxijedutot.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/snn33asjpr4ovp69j0ds4u8gpb/wufovubopokanonudijug.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/lebibibofetikuzajobabijo.pdfIn PDF document text
    • http://alompar.hu/uploads/content_files/files/jobifebofemevotafaj.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/kukefidujibulo.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7e28e07c15e9f26b00df370e2c072e08/70289490820.pdfIn PDF document text
    • http://a899.net/userfiles/file/52660240627.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/75674546938.pdfIn PDF document text
    • http://gpe-el.pro/ckfinder/userfiles/files/59786997607.pdfIn PDF document text
    • http://netmode.net/app/webroot/uploads/files/74683281200.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/ppkrfuqargltquiealsnftrd72/64223836097.pdfIn PDF document text
    • http://bwlpsalisbury.com/uploads/files/22519370198.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/6e7d2364bc3b9f636c423e0f55822365/zulafez.pdfIn PDF document text
    • https://reparation-mobile.net/userfiles/file/buvamapavujunixafinoso.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/70042499483.pdfIn PDF document text
    • https://mttrasportisrl.it/dati/upload/file/bizuwaxadaxazisakodidufim.pdfIn PDF document text
    • https://aneri12.cz/res/file/96846298461.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/mrrsdjr89sa2nsd3tvd2o5aegs/kaxiniga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=cyberpower+pr2200lcdrt2u+manualPDF 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_off0000b41a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB41A 14680 bytes
SHA-256: 33604353280ead5a121fa41b00a2a7e2ac9b933042a941938dc8dd3e2542f3e9
font_01_sfnt_off0000d86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86E 11128 bytes
SHA-256: cb7fa5a2d69e228fcdb3c06ba6ca5bf5c58d6a493db46c85e1b5406b5a2ab148
font_02_sfnt_off0000f255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF255 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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