Malicious PDF — malware analysis report

Static analysis result for SHA-256 207124c2298a23e1…

MALICIOUS

PDF

86.1 KB Created: 2021-09-24 05:09:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 34d350ddabc8e57f4f87727a2018414d SHA-1: 6c987b7969f7a1abcbe9eb117c51b77c37647c0b SHA-256: 207124c2298a23e160323e551271fa466f80f3d5adfca32ee9d3ffb6d72f5241
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs suggest an attempt to redirect the user to a secondary malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • 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://gasthaus-steinkirchen.de/img/editor/file/93191289520.pdf In PDF document text
    • http://phutungvespaco.com/luutru/files/zelofofewowusajonafoleral.pdfIn PDF document text
    • http://zjnep.com/ckeditor/ckfinder/userfiles/files/5444597871.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/pinuxem.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/41d6bd2548a96daf2a0d3729341845d1/zigerupinakafofujujadav.pdfIn PDF document text
    • http://dogomanhnghia.com/uploads/files/65571595094.pdfIn PDF document text
    • http://vansuloi.com/uploads/userfiles/file/sopewunajitokivoxe.pdfIn PDF document text
    • http://auburn-properties.com/userfiles/files/xobamiwujabepojada.pdfIn PDF document text
    • https://combrooncom.com/contents/files/34082834202.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/tuvuxiziredudibizelufagi.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1614c0d128a218---63945003947.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/4bf765384a179ebbf6553a262413ca55/zofoxilojujuraze.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/ge266l4b64mqn7al5g40a0qhmk/37382400780.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/vafafi.pdfIn PDF document text
    • https://inijariku.com/ckfinder/userfiles/files/37674329772.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210912031444.pdfIn PDF document text
    • http://spielundlicht.de/content_provider/documents/files/lunekolokopexezukatevag.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/tirubosojelojoz.pdfIn PDF document text
    • http://bellamy.tw/uploads/files/202109061753376140.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/161491f99b133b---tusog.pdfIn PDF document text
    • http://childprotectionindia.com/lexcyberia/userfiles/files/wefibanumetibinewafobavuj.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614206836c410---viruvesolixazobu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=disable+app+on+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_off0000ec7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7A 18056 bytes
SHA-256: d609fedbc7bc198605fff90e392016238fba143ab44bb4495ac8f7161e09cda6
font_01_sfnt_off00011b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6F 10428 bytes
SHA-256: 84196b40b217a255c40009a236ea9fa072e7a7a8d8fd2bd3fcda9751a77d0440
font_02_sfnt_off000132e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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