Malicious PDF — malware analysis report

Static analysis result for SHA-256 abfdb96c612717bd…

MALICIOUS

PDF

71.7 KB Created: 2021-09-12 21:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d44839e99ba9193ed519a686b13b3df9 SHA-1: b2d879d5db8db7bd083767b5ab544c20d0a98c96 SHA-256: abfdb96c612717bd1c9014216762610cc5d121015f77c0c4ef580ae284db02f0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. It also features numerous external URLs, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://garglob.ru/uplcv?utm_term=mobdro+for+smart+tv PDF link annotation
    • http://baovecongtruong.com/upload/files/29197249323.pdfIn PDF document text
    • http://tech-in.info/bramy/userfiles/file/24559759283.pdfIn PDF document text
    • https://dogathermalhotel.com/resimler/files/debakufusimapibesovarabox.pdfIn PDF document text
    • http://de.ruben.pl/ckfinder/userfiles/files/88516262377.pdfIn PDF document text
    • http://studiolorenzoni.eu/userfiles/files/44181764262.pdfIn PDF document text
    • http://biemmecommerciale.eu/userfiles/files/dineri.pdfIn PDF document text
    • https://fundreamz.com/ckfinder/userfiles/files/palenat.pdfIn PDF document text
    • http://sonhanint.com/uploadpic/sun/files/202109120206203374.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134c167975ee---19907616410.pdfIn PDF document text
    • http://sten.kr/club/data/userfiles/file/20210910181739.pdfIn PDF document text
    • http://nepalbestcargo.com/userfiles/file/rozofaxonigapuxe.pdfIn PDF document text
    • http://fazendasaojudastadeu.net/fotosempresa/files/zazojuwilanixelatejifaso.pdfIn PDF document text
    • http://www.erealitysolutions.com/tennisontario/assets/appsadmin/js/ckfinder/userfiles/files/70810599010.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613d18c0d7194---8470100964.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/77917cacd13f3456e4c9e0ada90b60fe/58733685365.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/18549711055.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16137899a7ca2c---12082082186.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/rifuwokizofe.pdfIn PDF document text
    • http://trunglamdecor.com/uploads/userfiles/file/talapafa.pdfIn PDF document text
    • http://roomyab.ir/basefile/roomyabir/files/44584793366.pdfIn PDF document text
    • https://xn--interpeas-r6a.es/upload/files/kawepakebi.pdfIn PDF document text
    • http://aylabawadi.ae/userfiles/file/35320841163.pdfIn PDF document text
    • https://campfun.myhost888.com/upload/ckeditor/files/60175353317.pdfIn PDF document text
    • http://tetrafluoro.com/upload/files/jalivizilo.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/gifetiladawu.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_off0000ba97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA97 15568 bytes
SHA-256: 51c87c316526287e0662c5b5ddf1fd0abdc648c117740c724379169139eaf2da
font_01_sfnt_off0000e1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA11 10340 bytes
SHA-256: f2857e912c7d2a917058236db99c02fa13e97f6b03ba728913de02375e89c496

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