Malicious PDF — malware analysis report

Static analysis result for SHA-256 95fa03e9f14f6a4a…

MALICIOUS

PDF

89.9 KB Created: 2021-08-27 15:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: f74ba23e5f2c4046e9be1177c78ed370 SHA-1: 663730392c1ccf5a9391822e5ec93b8fb061be81 SHA-256: 95fa03e9f14f6a4ae78cdd6249bea94bfb7008a123013cf7bb813b5443dce32f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of embedded JavaScript and numerous external URIs, many pointing to compromised CMS upload directories or disposable hosting, indicates a likely attempt to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jcbcharpentebois.com/ressource/site-image/files/38209334889.pdf In PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b44954cef55---posulatinosolisoxi.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/zezanonijowidemepexarige.pdfIn PDF document text
    • https://gullyracing.it/admin/ckfinder/userfiles/files/4978309378.pdfIn PDF document text
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/bulavoxawagoxakone.pdfIn PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/3625903841.pdfIn PDF document text
    • http://tinnaduraflex.com/uploads/files/mefemuxuzexexumaxadur.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/imu1mbr66cu6av27esglojsqeg/18341031921.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a5e32ddc8---pudirezonapekewet.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/2a604bf6211adee3511dc62fea605b5e/furapizawugutuwevopu.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a9f908ec9---30901971284.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/aa3c6d6635ec5c01639617427f6bcece/sozonifip.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/15136923781.pdfIn PDF document text
    • http://kronikarp.pl/ckfinder/userfiles/files/gimuzotoxomej.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/94295802391.pdfIn PDF document text
    • http://nprofit.hk/userfiles/migib.pdfIn PDF document text
    • http://drlalashow.com/php/billboard/uploads/file/javomewa.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072008f3d873---mikubolikevog.pdfIn PDF document text
    • http://suara.ru/img/file/7870033613.pdfIn PDF document text
    • http://sartor.ru/upload/files/9837467094.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/zulovadobuxesipetunegivox.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/45g8ng0afp5gj8qe26oin4ott3/65222160874.pdfIn PDF document text
    • https://futurefacesmiami.com/uploads/file/20454190498.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/3241c429f9a951969a60aaf1b8fdbb83/96184570510.pdfIn PDF document text
    • http://aviapartner.biz/js/ckfinder/userfiles/files/13672903184.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=craniofacial+fibrous+dysplasia+in+adultsPDF 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_off0000f4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD7 19660 bytes
SHA-256: 25ce23407af6633532dedb5be7d7e604893d7bd72aac5211226561a75dba7aef
font_02_sfnt_off0001406f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1406F 10868 bytes
SHA-256: e5f8bd1b6b00eac089af8c5b5dffdd554d039d2e28d463586d91f6f52d896586