Malicious PDF — malware analysis report

Static analysis result for SHA-256 eca2f5b36b7686b9…

MALICIOUS

PDF

70.9 KB Created: 2021-09-20 14:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 051d960032dbda286de84c0f86106264 SHA-1: 688867f420aefa567b079374d182774805308de2 SHA-256: eca2f5b36b7686b994c904d35a1bc3843e3a67c33133eeedb27c883c29132784
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' suggests links to compromised WordPress uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://laborke.ru/uplcv?utm_term=love+sonia+full+movie+online PDF link annotation
    • https://lp-tracking.com/userfiles/file/visozisazugejivutaxes.pdfIn PDF document text
    • https://hotelreviewreserve.com/basefile/hotelreviewreservecom/files/gorolisumafezoferoro.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133f95f5db8b---32059880098.pdfIn PDF document text
    • https://mimpishio.com/contents/files/maruz.pdfIn PDF document text
    • http://konberdbio.com/upload/files/jerotadifipuvuxab.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/damarilevuxamusomesuz.pdfIn PDF document text
    • https://unicon-msk.ru/data/files/tisejojiluxoxu.pdfIn PDF document text
    • https://escaletravel.com/userfiles/files/bumepova.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/161486a9a94723---86230451496.pdfIn PDF document text
    • https://remont-bez-zabot.ru/files/file/mazude.pdfIn PDF document text
    • http://sweet-sugar.de/images/uploadedimages/file/texowubojalufedalarenu.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/b8b6036641395d8183f946141f86356c/tumanesezemazajerugu.pdfIn PDF document text
    • http://shopgraeagle.com/ckeditor/uploads/files/62266995225.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/63825708081.pdfIn PDF document text
    • https://implantologie-deva.ro/app/webroot/files/userfiles/files/torokejapinome.pdfIn PDF document text
    • https://geniodelweb.com/file/88607175398.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/52672150154.pdfIn PDF document text
    • http://objets.immoweiss.lu/userfiles/files/59168807094.pdfIn PDF document text
    • http://ndt-ultratech.com/files/26040853667.pdfIn PDF document text
    • http://sk-massimo.com/js/upload/files/suwenunevabesep.pdfIn PDF document text
    • http://monikaknoblochova.com/userfiles/file/gupodazebubamef.pdfIn PDF document text
    • http://phamtrangia.site/upload/files/84766373604.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_off0000b47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB47D 16816 bytes
SHA-256: e6493bee3b2e72602bceec3ec148404c075fa2c3889222b8e81bd4ccc8c632df
font_01_sfnt_off0000df48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f75f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75F 10300 bytes
SHA-256: dd33240d4d0bfcbfa236fbf30ad17135ed1ac8ac105287e198e16c08d9ae245d

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