Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d1a19dbb61fe7cc…

MALICIOUS

PDF

92.4 KB Created: 2021-07-03 13:48:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 29d20dde388004016e6f5d39c9349111 SHA-1: 0c1e03af93945ae2ea3d8ee7204c0cd4cb05de15 SHA-256: 2d1a19dbb61fe7cc3959db8b8b4a46cc683bb0d72490104915ddf228f26ba83c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of numerous unknown URLs further supports the assessment of a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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 http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16095d938570fd---6778633177.pdf In PDF document text
    • http://heyumpnd.com/userfiles/file///loxaxedugotalazof.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/nanm6s4hirp4924lacjamkq5d1/xunefizu.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1608658f84404c---27181568547.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/07b57fccae6877b1eee54e84a9eb0276/pavax.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/kuwupakusigarimatazoz.pdfIn PDF document text
    • http://oodow.cn/upload/file/210628140407270026s2rkdi4rzz4x.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607da7048b66a---malebebovalupimezomunabaw.pdfIn PDF document text
    • http://steammining.com/userfiles/file/49261820353.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/zofaritukapozajutupoxenik.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db15ae5d12---94347067521.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/nikul.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160dfde0b52972---22531105313.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/fiwenumopebimosizole.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/fe7ad314dc54f7baefcd1adb09f71c60/46830963955.pdfIn PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f1644b21c---wovedefalimilurenoguten.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8eb56fd99---73043328046.pdfIn PDF document text
    • http://guides2alpes.org/uploads/file/xijolutofakajejowadoda.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/abed81a219329a6d336efc90edc46c4a/fekisot.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/66726419349.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/posugajot.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/90652199872.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/3orsm25bor1v5gjnu8k1073epa/jifojokegazexumop.pdfIn PDF document text
    • http://rurisnet.org/images/file/2004914496.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=thompson+and+thompson+lawPDF 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_off00010700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10700 10384 bytes
SHA-256: a270f4a2a1ea839f96276ea81ad9bfc4f1c3823320137957115b5bcfeadf870d
font_01_sfnt_off00011e5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5E 17644 bytes
SHA-256: 8266048ec812493f070ab30e5de8517315a1c746630c466bce076bbc87aef13d
font_02_sfnt_off00014c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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