Malicious PDF — malware analysis report

Static analysis result for SHA-256 745eb43baa3b0f53…

MALICIOUS

PDF

81.1 KB Created: 2021-10-14 02:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: b4ad08edfc709cfaa5620ce1b800a1af SHA-1: 40e28ca37a18f32b39651b1ff5c671beffc25eee SHA-256: 745eb43baa3b0f53690f4468a57544864a5d2db3161b47ea33224f68192a754a
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, many of which point to PDF files on various domains, suggesting a phishing or redirection scheme. While no scripts were explicitly extracted, the presence of external links and the overall detection profile strongly suggest it is part of a phishing campaign, likely attempting to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://madmojo.com/fckupload/file/2194782712.pdf In PDF document text
    • http://hqshop24.com/userfiles/file/tevusesiwavoluligupol.pdfIn PDF document text
    • http://lingvastar.z-i-g-z-a-g.com/userfiles/files/zamiduxawebiwubusamejo.pdfIn PDF document text
    • http://koovappadyscb.com/ckfinder/userfiles/files/35449338457.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/togewasavurosebufadur.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/4848568877.pdfIn PDF document text
    • http://chanhungcorp.com/images/uploads/files/94750740180.pdfIn PDF document text
    • http://khonggianxua.samdigroup.vn/app/webroot/upload/files/gokujojidejowijideli.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/fd52a904af3d523f37d5677d3b56d63a/82097180514.pdfIn PDF document text
    • https://butchercurnow.com/img/shop/contents/miduxeme.pdfIn PDF document text
    • https://crv.dascalita.ro/app/webroot/files/userfiles/files/77779597976.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/93042654897.pdfIn PDF document text
    • https://ever-progress.com/upload/files/dilag.pdfIn PDF document text
    • https://blnk.eu/userfiles/files/xixenaw.pdfIn PDF document text
    • https://nhuadailoan.vn/upload/userfiles/files/40216048968.pdfIn PDF document text
    • http://seksdagen.nl/userfiles/file/zunarij.pdfIn PDF document text
    • http://trip-sale.ru/userfiles/file/79851102407.pdfIn PDF document text
    • http://hawaiianhunareiki.it/file/jedakode.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/kakekiwujovelasudirolilat.pdfIn PDF document text
    • http://alphamarino.kz/images/news/file/kujipesokasupune.pdfIn PDF document text
    • https://cryptobasics.biz/uploads/files/wuxigabebez.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/37173555078.pdfIn PDF document text
    • http://855solution.com/htdocs/cljr/data/files/21066864208.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/23D8k0Ec_6w/uplcv?utm_term=to+put+a+spell+on+someonePDF 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_off0000d720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD720 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF37 10284 bytes
SHA-256: 9424d9aac05a1c73186f2fc017b789ecb98fda6031c8b3a8a95651cb6f559f93
font_02_sfnt_off00010669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10669 18788 bytes
SHA-256: fc2154d3ba55f5e1a7c2bce20325a484a5dcc12a8f6a2a8463d4ad434da2322f

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