Malicious PDF — malware analysis report

Static analysis result for SHA-256 965cac3a8bf355f4…

MALICIOUS

PDF

67.1 KB Created: 2021-09-27 04:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a5f3d7b8a12c004a3a6ff4ddac54ad7e SHA-1: c05722f0df020116bc829d84fbd4bf6697d9ed2c SHA-256: 965cac3a8bf355f410a4980a4fa992b80b5c72a9faa8a4a054f3c9d1d83b3db7
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains embedded JavaScript and numerous external URIs, many hosted on compromised CMS uploads or disposable domains, suggesting an attempt to redirect users to malicious content. The document's structure, being image-heavy with minimal text, further supports its use as a deceptive interface to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://banquat.com/userfiles/files/rupewalolerebesa.pdf In PDF document text
    • https://masteranalog.com/userfiles/file/83655257827.pdfIn PDF document text
    • https://tuyendung.vinaonegroup.net/upload/files/53088683527.pdfIn PDF document text
    • http://dralituncer.com/userfiles/file/tigevabuxavoputozazimi.pdfIn PDF document text
    • http://geojeoceanhotel.com/userfiles/file/20210926021321.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/161451d90562b7---jituxorawojosamenofuluvik.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141ccf9642c1---36646727708.pdfIn PDF document text
    • https://basisnomor.com/contents/files/kigojiw.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/zerunakegepogijagiw.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/161448c5635bb2---34973294753.pdfIn PDF document text
    • http://xn----7sbjvweekof5d.xn--p1ai/files/files/24907840026.pdfIn PDF document text
    • http://ewtch.com/upload/files/latelomofurizesivebilin.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/53700857128.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/supafedunotovonuje.pdfIn PDF document text
    • https://promise-land.com/upload/file/samiloporotunan.pdfIn PDF document text
    • http://fabriquetextil.com/js/new/fckeditor/userfiles/file/20860949935.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210902141806.pdfIn PDF document text
    • http://ets-sptk.ru/pic/file/3206953776.pdfIn PDF document text
    • http://www.horakgolf.cz/ckfinder/userfiles/files/barovefijewofirotemibu.pdfIn PDF document text
    • https://ngusacdon.com/upload/files/51095922615.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/32011994288.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=what+is+android+castPDF 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_off0000ac8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c4a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A4 10280 bytes
SHA-256: 4ba6cf162fd7c00940eadb44cf031c595b888b36112334a2237b02f3dfa37ed7
font_02_sfnt_off0000dbc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC0 14396 bytes
SHA-256: c9469b7cc61d57e2b8a3bf4cd6f6644ba26ef94d04667753ca10b54ea5fa6f19

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