Malicious PDF — malware analysis report

Static analysis result for SHA-256 42e465a1605a1ca8…

MALICIOUS

PDF

86.3 KB Created: 2021-09-11 06:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: bdff8ee9e62bd80e8d3851ea0f78495f SHA-1: 9ca729f3ae6f1deacd68737d9232d7c31dfe2cb7 SHA-256: 42e465a1605a1ca82ee5de8c95712cbb29b0d087b767eb2ce74c20a1ef33ee7a
164 Risk Score

Malware Insights

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

The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. The PDF also contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://angelofthewinds.net/ckfinder/userfiles/files/molananepatudidede.pdf In PDF document text
    • https://mfdesign.hu/files/file/31752010392.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/ilfpaifk2dk567v5ufj0sbe5i4/damenirupeko.pdfIn PDF document text
    • https://cultureresortpokhara.com/assets/userfiles/files/24047134062.pdfIn PDF document text
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/fugemufuru.pdfIn PDF document text
    • http://jeansresource.com/js/ckfinder/userfiles/files/dosafulipalu.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/nopulatexeso.pdfIn PDF document text
    • http://richardchong.com/userfiles/files/87262551816.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/50454964573.pdfIn PDF document text
    • http://cesarrodarte.com/userfiles/file/57007498407.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/bigibu.pdfIn PDF document text
    • https://servicepapik.ro/files/94036530201.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/wafodibawute.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/8777293304.pdfIn PDF document text
    • http://owv-sad.de/userfiles/files/balupuvelefivisizavus.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/wibaporuduwa.pdfIn PDF document text
    • http://ijfbn.com/editor_up/pafuzugobozararotepigeza.pdfIn PDF document text
    • http://zvaracskaskola.eu/editor_uploads/system/files/sevefutanojariloxerevajaw.pdfIn PDF document text
    • https://perfecthospital.org/ckfinder/userfiles/files/janimidaduwifoxuzuja.pdfIn PDF document text
    • https://seikai.jp/free_images/files/22011438642.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/90d4b213a19ea8d860678a4aaf412220/disuzimavilifulezev.pdfIn PDF document text
    • http://razzledazzleevents.in/userfiles/file/63791208591.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/mosit.pdfIn PDF document text
    • http://ezclasssites.com/var/wwww/dev-ezclasssites-com/data/files/22902129624.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/25156340404.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a873b841ab---86787883416.pdfIn PDF document text
    • https://frontivo.ro/userfiles/file/91381073139.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=free+sky+news+app+for+androidPDF 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_off0000eb98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB98 10616 bytes
SHA-256: 4fcc27ec3033e67e42fd77b90b05d6f2d3d9cd944570cdf2b0081cbbed05a791
font_01_sfnt_off0001040e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C20 18116 bytes
SHA-256: 0f0e74a428d12c14c3a883f396c2c7e7c517d64014e5b518319a715139dcb102

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