Malicious PDF — malware analysis report

Static analysis result for SHA-256 04fb976661537fea…

MALICIOUS

PDF

86.6 KB Created: 2021-08-06 00:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6a4621ba95fe1917fb2a5aa85148df13 SHA-1: 4e7d1a238376fc1f555f826366c13cd3e9881b85 SHA-256: 04fb976661537feacd6eb3f8fefd07ae7c566fc4af17a20890fa54fd6afe5bc1
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS upload storage, suggesting an attempt to redirect users to malicious content. The presence of numerous external URIs and link farm heuristics strongly suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://areaengineeringsrl.eu/userfiles/files/buvawevokitozoxiba.pdf In PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/52f6ceb1e33082f34c627947a7f188a9/netuniji.pdfIn PDF document text
    • https://gilbertems.com/videos/file/27755871046.pdfIn PDF document text
    • http://liqaa-lb.com/files/userfiles/files/duluwof.pdfIn PDF document text
    • http://doanekeyes.com/userfiles/docs/benaf.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160869f0dd5700---8590634278.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1609c09f9146ee---raxudufesijebezivizu.pdfIn PDF document text
    • https://vientangluc.com/upload/files/nigivatunujusuluk.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/133d33cef39d104208710cc8dd50fad8/98551842899.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/52f9acbc49dff449dc9e218bf2b6b752/nezawu.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a27e8ae2c16---34851461329.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/14c9c6dfad297baf7689b1de5e1f0a4d/doxokukuxevixik.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/oufij21m9g47aluv4p6tu5gqk3/wefiwomojatoluvav.pdfIn PDF document text
    • http://www.kymenhome-etsinta.net/tiedostot/files/nijiwiselomuraxi.pdfIn PDF document text
    • http://magicdiscoradio.hu/userfiles/file/soladetidopirofex.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bc00597e06d---50197760373.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/debarevedalikituvolegu.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/miwidanagorafuwajafabenis.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/mixibedo.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16094ce27e1920---vexivekatuzafopaxurix.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/3a5e33363674e015b75181ccd1335d47/muwomowogojaxomopiluxuka.pdfIn PDF document text
    • http://jmk.kr/ckfinder/userfiles/files/68613879350.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=lasers+and+feelings+rpg+pdfPDF link annotation
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/kujoduvobobesukaturit.pdfIn PDF document text
    • 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_off0000eeee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEE 17744 bytes
SHA-256: 8a6da146c2a86879ca508ae92384b6e1c6cdf936cffc8956733e51b22caef42a
font_01_sfnt_off00011d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13577 10412 bytes
SHA-256: 871e2019688a188e44160c373fb0d6a1d2d7319134597e473cb9e62ce0adcd72

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