Malicious PDF — malware analysis report

Static analysis result for SHA-256 32854d182ac9b00e…

MALICIOUS

PDF

83.5 KB Created: 2021-09-07 04:18:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fdca5be44c3605ad53398efc35dec82e SHA-1: 9cc4089ab3517846eca6626253fe6ac924f303ac SHA-256: 32854d182ac9b00ed0e8d788aa6386d6f70ba06e3c1ec1f5af5165b6ed57c714
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 https://philabc.ru/uplcv?utm_term=exercices+corrig%C3%A9s+valeur+absolue+pdf+seconde PDF link annotation
    • http://wohntraumgmbh.at/faxuxejaseburaxox.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/2021922222371864.pdfIn PDF document text
    • http://portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/bodudujizunot.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c751ad8ed2---munuki.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/9715279558.pdfIn PDF document text
    • http://intelekt.biz/uploads/pages/files/93874230421.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/gekidejanetiporamogi.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/08/06/file/20210806_183724_102.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/sewepebagup.pdfIn PDF document text
    • http://protok.pro/upload/files/vunobojudesunut.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/7155156968.pdfIn PDF document text
    • https://tezerwatch.com/file/upload/files/08-24-09-32-04-66.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/dcca4265d500c2c89f5c69d323806227/45193689621.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/014f15f47fab343b8efa91d4a496cea6/sitizabare.pdfIn PDF document text
    • https://kamarkosong.com/contents//files/56637650924.pdfIn PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210721_EB98673779498AB8.pdfIn PDF document text
    • http://tuvanluatdanang.com/upload/ck/files/tivosokanisorunopikuzo.pdfIn PDF document text
    • http://mrsjamesirvine.com/clients/82887/File/nigewenasebojipoku.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/48krgrn0de1qbilrcsj8l5edg7/puxomipe.pdfIn PDF document text
    • https://aprenda-atdi.com/uploads/files/nixiwogisuwes.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA76 11240 bytes
SHA-256: 89c79e386f9812de384f4eae95ef1e1579e0ddad22315489183d7f3c3177b58b
font_01_sfnt_off0000e433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE433 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_02_sfnt_off0000ec2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2B 22696 bytes
SHA-256: 4d60672ff8fd73ef736e02b4adb0d819fd4ae3532961f043488987d27146384e
font_03_sfnt_off0001257a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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