Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe6935735772b7de…

MALICIOUS

PDF

79.2 KB Created: 2021-09-07 15:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ba5e0a319f51fce06dbcd9405692e899 SHA-1: 1d6715de0774a2daa03aabf8dd5f7bf3d6f7a0cc SHA-256: fe6935735772b7deaf61daf0de31ecf54af95570f2e5fa3df05fb47177fe0525
164 Risk Score

Malware Insights

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

This PDF contains embedded JavaScript and numerous external URIs, many hosted on compromised websites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these external sites, which are designed to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://coretry.ru/uplcv?utm_term=unwritten+rules+eliahgreenwood+pdf PDF link annotation
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/p2egf4o3rt1dm3kn71mobp735s/fopivetipupimor.pdfIn PDF document text
    • http://wahluenfty.com/userfiles/biratewifaxirexakiletani.pdfIn PDF document text
    • http://aumnat2car.com/ckfinder/core/connector/php/upload/files/17967877443.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/pimufujalukazazeze.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16094acd24bb72---nejene.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/iq0ga4a1cdlg7f75u2hafovdlb/58522538003.pdfIn PDF document text
    • https://khanikango.in/file/zawogatigijokubole.pdfIn PDF document text
    • https://thebookonpersonaltransformation.com/FCKeditor/file/72767615221.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1166d127b---difabavuguxag.pdfIn PDF document text
    • http://trips-in.com/ckupload/files/61809821835.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95476178048.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/mibep.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/65485842902.pdfIn PDF document text
    • http://kingsauto-bar.com/js/upload/files/68027940390.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/161373841c2bca---gebuvelurubumexetu.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca6caaae64---74601355424.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/6dbd309d5a9d2c4052cfc34999e5b306/60905170617.pdfIn PDF document text
    • http://mega-gold.com/userfiles/files/98218493136.pdfIn PDF document text
    • https://notrepanierbio.ch/userfiles/file/41466112442.pdfIn PDF document text
    • https://andrejc.si/files/file/sotubusinewovozisoweki.pdfIn PDF document text
    • https://cnn-logistics.com/asset/files/dasim.pdfIn PDF document text
    • http://zonweringbelgie.nl/ckfinder/userfiles/files/lisevopilaxonika.pdfIn PDF document text
    • https://osiindia.org/ckfinder/userfiles/files/80798075015.pdfIn PDF document text
    • https://yapluka-services.fr/userfiles/file/zaxijunopaza.pdfIn PDF document text
    • http://terrietanaka.com/library/files/nezajefefajopob.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_off0000d08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD08A 10968 bytes
SHA-256: 779d90e39c2d5837a9bf0162c8fe5b638a53c16b5a52f821a3b96404904ab0c0
font_01_sfnt_off0000e9c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C9 17572 bytes
SHA-256: 1244d6b95637b343051745865151b00678eb9ec4b06759ebabe0ff64246ec3b3
font_02_sfnt_off000116d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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