Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce30a39d9660613a…

MALICIOUS

PDF

72.6 KB Created: 2021-09-06 07:35:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 640980b3ce36c1437997abe0163094be SHA-1: cbee5af08305cc0c0dbb1b1d947a04b82d3954b2 SHA-256: ce30a39d9660613ad98b28db23f32b94f22d9c1e3f3346d65b210787432083f9
164 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript, which is a common technique for delivering malicious payloads. The numerous external URIs point to compromised websites, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the execution of further malware or exploitation of vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://philabc.ru/uplcv?utm_term=jingle+bell+rock+ukulele+chords+pdf PDF link annotation
    • http://zonwering-nederland.nl/ckfinder/userfiles/files/66610468995.pdfIn PDF document text
    • http://gasnguyenanhst.com/js/ckfinder/userfiles/files/fasirapapuz.pdfIn PDF document text
    • http://computergramm.com/userfiles/file/lekusevisaxetanub.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102bb2b41b72---61061714540.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/37aee46f5ca4ddace247aa6fb4e827ed/zipibenazenojav.pdfIn PDF document text
    • https://hurghadalife.net/userfiles/files/jufasiniro.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160791d0367980---14769998435.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1610f292086126---76049660285.pdfIn PDF document text
    • http://savages.lu/imagesRTE/files/vekononigemu.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/ff8c5f5c3c5762fef9a6187de102b4ef/gamemogavojidemib.pdfIn PDF document text
    • http://cayxaotamphan.net/userfiles/image/file/kemelujomikosenapu.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/k4884c0lg65ubu404l2oi1ump7/18706279339.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/mefexajojaxetatakutopafo.pdfIn PDF document text
    • http://ruben.pl/ckfinder/userfiles/files/69056171817.pdfIn PDF document text
    • http://muntepa.com/userfiles/files/sefefanovedezawifa.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3e7b632fc428e969781089a9e4b819a4/sigaxu.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/notuvagolixedewavopar.pdfIn PDF document text
    • https://khanikango.in/file/32779324372.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/19945678976.pdfIn PDF document text
    • http://vizesblokk.hu/files/file/67255088012.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16083883290b59---kajififutadatagenedarebod.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16099cfcfa1356---53199062156.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/9u6do38jgkpfl19beop8cncn91/14806782467.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFA 16960 bytes
SHA-256: ebb87c30a96ec6994fd358aee562c13068d573ffedc6e637faa6a383e9a8e2a4
font_02_sfnt_off0000fba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA0 10960 bytes
SHA-256: 80ae6d29d0f527137e77c1ebe2026d290c6daa9cf8d0512d728df25a46b00885

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