Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5a9b0dac0abf44a…

MALICIOUS

PDF

60.9 KB Created: 2021-09-25 04:11:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 39eaa3cc39666235f8f18837aa03f961 SHA-1: 7d911eb069918429e80319a2d95a29fccc181df1 SHA-256: e5a9b0dac0abf44a2cba6d7d9063c89175d01e09a83fa065512eeb087e2295f2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to various domains, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6508

Heuristics 5

  • 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
  • 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=can+i+transfer+my+contacts+to+my+new+phone PDF link annotation
    • https://gerbangkuis.com/contents/files/41303772157.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/29666215524.pdfIn PDF document text
    • http://rlmlaw.com/images/edit_images/file/velifobuzifemaxeru.pdfIn PDF document text
    • http://templeton.sk/userfiles/file/39064477183.pdfIn PDF document text
    • http://denis-lefebvre-services.com/fichiers/file/11931208466.pdfIn PDF document text
    • http://www.cemeba.com/uploads/ckfinder/files/sadepomamobagufujasun.pdfIn PDF document text
    • https://pixel.bg/img/file/69799063187.pdfIn PDF document text
    • http://anipetkingdom.com/webroot/img/files/19589202382.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614954b84fbba---41727633184.pdfIn PDF document text
    • http://teranor.com/ckfinder/userfiles/files/44835113600.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210908164311.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/93666583581.pdfIn PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/kinad.pdfIn PDF document text
    • https://doluhosting.com/calisma2/files/uploads/pizukojefakunijogiru.pdfIn PDF document text
    • https://synersys.fr/contenu/file/nunumofapuwe.pdfIn PDF document text
    • http://kmbb.at/userfiles/file/mafopuwofefamujosijep.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/161430f9954c50---45628410384.pdfIn PDF document text
    • https://lapakunited.com/contents/files/pavupu.pdfIn PDF document text
    • http://zhuoer.ltd/userfiles/file/wisudusuzifeloxunipowev.pdfIn PDF document text
    • http://champagne-marc-chauvet.com/images/files/97368104731.pdfIn PDF document text
    • http://healhumanity.foundation/userfiles/file/paxozusawararulug.pdfIn PDF document text
    • https://epiphanych.com/images/file/bazutupe.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/4b26cd8be9415b18e1ad5148de0f89a7/luxuvib.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/45697647903.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aeff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEFF 10932 bytes
SHA-256: 797e21ccd9e16b50a0d7509d99ec516e3bc63c1993cf1f227e3fdbdf0c34a755
font_01_sfnt_off0000c849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC849 16016 bytes
SHA-256: d737fea2bb61e1efa478ad268d89f022f7ce3a9283ab41955484455c708e8ca6

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