Malicious PDF — malware analysis report

Static analysis result for SHA-256 98fb2a126bbdaf87…

MALICIOUS

PDF

90.3 KB Created: 2021-09-22 11:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2799f3e7a263aee97ce813b98c983d30 SHA-1: 8c262cca43dc3ba963e17adadf800d71912adff9 SHA-256: 98fb2a126bbdaf87360c376a73226c4b10a6523a5f3c195f7601bfe3253d1ddb
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 compromised websites, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous URLs on potentially compromised CMS upload directories reinforces the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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.
  • 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://deltarents.com/upload/ckfinder/files/vugemomowote.pdf In PDF document text
    • http://w.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/91046351928.pdfIn PDF document text
    • https://sbsoftware.ro/admin/userfiles/file/37954459025.pdfIn PDF document text
    • http://clingac.es/d/files/38770009939.pdfIn PDF document text
    • http://uzks.hr/upload/datoteke/34595646724.pdfIn PDF document text
    • https://newline-eg.com/userfiles/file/loxigemusetatevuzisogo.pdfIn PDF document text
    • http://sonnenheizung.ch/fckeditor/editor/images/file/lewakuwosomezemed.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134844f592f3---19936723186.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/64162977006.pdfIn PDF document text
    • https://bushregenerators.com/userfiles/files/99296443623.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/semofatoma.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/97309696826.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16135c8fe1e440---munogegisox.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141c2bc49559---kerozubagekigavibefe.pdfIn PDF document text
    • https://seedomoretravel.com/files/files/73995506814.pdfIn PDF document text
    • https://yaslibakicisi.net/userfiles/file/61075395013.pdfIn PDF document text
    • http://astmasme.com/userData/board/file/zunuzese.pdfIn PDF document text
    • https://blogsma.com/files/xigixajilonofezobifus.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/8fec8d80c3a4f1d290c5af900e28b169/pukusebovivijedidixokep.pdfIn PDF document text
    • https://ww150005.linebot.net/upfile/files/20210905063213.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/zuwizi.pdfIn PDF document text
    • http://librojuridico.com/aym_images/files/19116173321.pdfIn PDF document text
    • https://nawaasha.org/userfiles/file/96966640981.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/58961320193.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/bexor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=download+god+eater+burst+ppssppPDF 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_off0000f69f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69F 20036 bytes
SHA-256: 2b8434207a1273fa63abd83631cce9871347bc371abb98b9ceb0d5a7c74ee1b3
font_01_sfnt_off00012aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEE 10800 bytes
SHA-256: 903c23c60a92ce6f324a212cfc143dfca9e9d236b9b2379500256014903b4c9d
font_02_sfnt_off0001439d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1439D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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