Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ec0ba9d0d8454e…

MALICIOUS

PDF

108.7 KB Created: 2021-08-18 15:01:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 6a689a7c931511d926aedeb724a456c6 SHA-1: 61d949958bf45232ed8549b167d34ce671a0bcd8 SHA-256: 75ec0ba9d0d8454ed14b8591cf426d1e8ff6f45a4e9d60a6d8c5a4018d6bdf2c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a link farm with numerous URLs, many pointing to compromised CMS upload storage, suggesting an attempt to redirect users to malicious content. The presence of multiple external URIs and a link farm structure indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://bem-sa.com/img/file/26133891286.pdf In PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/viwojitebulogedexidapal.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/vomugusinowurepepinu.pdfIn PDF document text
    • https://10glazsikeyrosa.ru/file/jaden.pdfIn PDF document text
    • http://abwrosedale.com/uploads/files/jokamosarajorelijugaze.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081382f29bca---duboduzajejenafipiwu.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081185e5ffd2---midor.pdfIn PDF document text
    • https://tinnituskozpont.hu/files/37598108608.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160fd739db184c---71295544878.pdfIn PDF document text
    • http://lakehighlandsrw.org/clients/863582/File/22780959952.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c74ea550c47---81839248189.pdfIn PDF document text
    • http://hnkingdee.cn/Files/file/202161716247.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/f4nts2tbipdv6g3do7tu705fo4/93172268503.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//sedefodofexozor.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160708c137c8c8---darupipixuzajupof.pdfIn PDF document text
    • http://www.centralperdana.com/file/kakim.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/segixonijul.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/15846796386.pdfIn PDF document text
    • https://xyoaa.org/sites/default/files/files/piridenuxaga.pdfIn PDF document text
    • https://topaldanang.vn/uploads/image/files/53030532402.pdfIn PDF document text
    • http://verkaufs-akademie.com/userfiles/file/4915521528.pdfIn PDF document text
    • https://upbilbao.com/ckfinder/userfiles/files/66674083983.pdfIn PDF document text
    • http://www.fred-robin.com/ckfinder/userfiles/files/45975143866.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/f5a601942b056914ed16365548e85758/lexuvavajakis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=how+do+you+pan+in+tinkercadPDF 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_off000144aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CBC 17832 bytes
SHA-256: 7fe36cd49d9b137a48462de86814325e1856fb861c9e4eced1f1598a57418458
font_02_sfnt_off00018b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B8C 10676 bytes
SHA-256: 968a0677c3b268e160ce1c9447752c7feac3e5ba6d092e2801148849a972aff9