Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dbb0e979f143819…

MALICIOUS

PDF

73.2 KB Created: 2021-09-08 14:20:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2ce655272bf75bb3237622b9b5e87429 SHA-1: 9f33ee8590b8c85dd32af18c5653f195a84ab6ea SHA-256: 8dbb0e979f1438199f2c097cd7ac22ab56188be3d8d331b05238a47a93205f53
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is identified as a link farm, with several URLs pointing to potentially compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing 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 0.9947

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://tw-tms.com/uploadpic/xw/files/vejoji.pdf In PDF document text
    • http://vivatbacchus.hu/files/file/21134731546.pdfIn PDF document text
    • http://studioghittigargnano.com/userfiles/files/rusegufetokiro.pdfIn PDF document text
    • http://hanyangsteel.com/files/fckeditor/file/194533981361335dad6e64f.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/sonosaminitani.pdfIn PDF document text
    • https://pakianco.ir/data/image/uploads/news/files/tirizopagefepesiluro.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210908162739925.pdfIn PDF document text
    • https://hahapediatric.com/uploads/files/202109050954224465.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd8d919658---62918858827.pdfIn PDF document text
    • http://888spirits.com/userfiles/file/71382722504.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/fedikiwejatosom.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/658bd19b4ff130db425c21a0f6b5e5dd/713246500.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/gemofobunimanoreza.pdfIn PDF document text
    • https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/23299959062.pdfIn PDF document text
    • http://chongqinghaohong.com/upload/files/bazizuwama.pdfIn PDF document text
    • https://peiitw.com/Upload/ckeditor/files/morufaveziwezi.pdfIn PDF document text
    • http://globalone-mould.com/gbw/fckfiles/20210907170001.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021090603422298.pdfIn PDF document text
    • http://hevolta.com/upload/file/jimenaxoz.pdfIn PDF document text
    • http://onyx-innovations.com/assets/ckfinder/userfiles/files/sipojodape.pdfIn PDF document text
    • https://fond.ru/userfiles/file/begomo.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/16508799604.pdfIn PDF document text
    • http://gazduire-domeniu.com/UserFiles/file/sutatomewe.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134230557f6e---duvutusexujilodiw.pdfIn PDF document text
    • http://girlstown.org/files/js/ckfinder/userfiles/files/87559229224.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=convert+pdf+to+jpg+using+imagemagickPDF 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_off0000ba94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2AB 11336 bytes
SHA-256: c9d30d7bab8e7ffb0927288d1e7e6b6586e30edee4da98a0fd73728720d65ac5
font_02_sfnt_off0000ed2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2D 16372 bytes
SHA-256: f73d410bb2706adcf516305cefdba06d5fc1535b60bb76815944c00d0715d018

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