Malicious PDF — malware analysis report

Static analysis result for SHA-256 24c2b29f8ab46ee3…

MALICIOUS

PDF

84.7 KB Created: 2021-08-10 12:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f5d6ad5e0a37beb7c6c17ef996f756ab SHA-1: 74e1c386871ac6f2f1e22c60e928ed6373e265f1 SHA-256: 24c2b29f8ab46ee32ff6f2042fdb12287e668afeb5f3e98870fcbbfe1664b2fa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting it functions as a link farm for phishing or malware distribution. The presence of embedded URLs and the nature of the links point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://queure.ru/uplcv?utm_term=cuales+son+las+bases+nitrogenadas+del+arn+ribosomal PDF link annotation
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d52faeb6c---ditonuwir.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/onkovgbu28a7im165o36bdre14/pizexewonupupe.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/0374a5231a80c45f55398d6b1fed9ca8/70669367654.pdfIn PDF document text
    • https://esvigo.com/upload/files/pakukexepaduzunotipeb.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/58104506912.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d4835e5ce---14419389166.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/29609316148.pdfIn PDF document text
    • http://thesetnews.com/images/fckeditor/file/20068850515.pdfIn PDF document text
    • http://gyobel.itpublic/file/33261260107.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/2bf0bd441ae667227e01995fc5e658a7/76081882116.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c9800d50a---20777850636.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///45162422461.pdfIn PDF document text
    • http://fruitvita.com/files/files/nadajutixumafezogujurid.pdfIn PDF document text
    • https://creteservices.com/FCKeditor/userimages/file/34426639700.pdfIn PDF document text
    • http://watdoenwevandaag.nl/upload/8121519483.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/4f3k620r0ir1509um4cj7biuj3/3529809984.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/ede9ug8q8e2ragmkimenj1fa6j/33886108508.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/89971044049.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/xuzixusotezodakuzibugufa.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/tiwutakiponolaluterifud.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/40511071940.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2c85741c82abff0852a37dc160005f67/vuwadenevefudili.pdfIn PDF document text
    • http://gchs1969.com/clients/867877/File/98779671855.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc47b981d3---63053382315.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/7k52kgc2ctn75f3g8qm6iehoh8/54724218397.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_off0000e7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFB 10860 bytes
SHA-256: 32955bbf6bb68954494619df3723b8d26af76cd9d64442139560fa5326b5daf4
font_02_sfnt_off000118d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D4 16748 bytes
SHA-256: 124b338bc40a4519d30e4e05262394e563e785d59f63a76045d406df0db8c341

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