Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bdaacd248413601…

MALICIOUS

PDF

80.7 KB Created: 2021-09-20 07:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: d5d4f6ef4dc57a769b6a5c13891c90a3 SHA-1: dbbba32651deaa962397596bb6382f2a20a3ac1d SHA-256: 6bdaacd2484136013da80e77d0ac2e733dde6e3389436de6643303a57fa98717
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised CMS platforms or disposable domains. The presence of external URIs and link farm heuristics indicates an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 https://philabc.ru/uplcv?utm_term=one+two+three+full+movie+download+hd+720p+bluray PDF link annotation
    • https://onsale.social-push.cc/data/fckeditor/files/liwapitanumejixavaxali.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147dcda96ffc---guzimewibugadasidetukazop.pdfIn PDF document text
    • http://onthebroadway.com/CPD/adminpanel/upload/file/wunefepesepubuguje.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16147126157a9e---dofopizidanomafag.pdfIn PDF document text
    • http://nineslash.com/user_file/file/43619168468.pdfIn PDF document text
    • http://weiken-rc.com/upload/files/82938266530.pdfIn PDF document text
    • https://www.paseppe.gr/ckfinder/userfiles/files/23831196825.pdfIn PDF document text
    • http://mrs-edu.com/sribati/editor/uploadfiles/591278821.pdfIn PDF document text
    • http://abpjseah.news-read.com/upload/files/77668028073.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/madakewakal.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/88f1c9e27ab33e16e13b1f8875711104/88680834545.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/61429951293.pdfIn PDF document text
    • https://thefertilizerproductionline.com/d/files/lijonupozuduxeravutozef.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/71bf6d9a44092dc49725c8d12ac7e384/66960717488.pdfIn PDF document text
    • https://zaindu.drogomedia.com/files/galeria/files/82985311738.pdfIn PDF document text
    • https://www.privathospitaletkollund.com/ckfinder/userfiles/files/37146794918.pdfIn PDF document text
    • http://szintai.hu/ckfinder/userfiles/files/pajilikadezawop.pdfIn PDF document text
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/152041517793.pdfIn PDF document text
    • http://avatars.ru/userfiles/file/vawapememuxidojubojiz.pdfIn PDF document text
    • http://reginahajo.hu/_user/file/34769680720.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/79710624818.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1613f8e00e882e---gubebenitifekojevatek.pdfIn PDF document text
    • http://yuemeism.com/uploadfiles/files/pewifirobexit.pdfIn PDF document text
    • http://atomicattack.com/atomic/fckimages/file/xuxizivebulitid.pdfIn PDF document text
    • https://nepalipublisher.com/ckfinder/userfiles/files/batapesesov.pdfIn PDF document text
    • https://tradingphrases.net/userfiles/files/53419551550.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_off0000d479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD479 11420 bytes
SHA-256: 234fa9a78a4dab47cb2962e25cb971f7af1af5c976b80b463628362650f3decf
font_01_sfnt_off0000ef16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF16 17640 bytes
SHA-256: e5c407d9f4b7205702096c0ea84bc081d74ca37744780d0b5daa52f1fb2648f1
font_02_sfnt_off00011cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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