Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ad29f2d2b69ac7f…

MALICIOUS

PDF

95.3 KB Created: 2021-08-12 23:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1653634c1c08e2e25433dbc5d561350a SHA-1: ab5a8c89e6cf68583a1aecb47dd2e17f4945c506 SHA-256: 0ad29f2d2b69ac7f6fcecb241ad3c006703f3ca642aa84d83096e8838dbb0be1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress uploads and other disposable hosting, suggesting an attempt to redirect users to phishing or malware sites. The PDF structure itself does not contain readable content, but the embedded URLs and heuristic firings strongly suggest a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://catamma.ru/uplcv?utm_term=jose+emilio+pacheco+las+batallas+en+el+desierto+analisis PDF link annotation
    • https://kede.org/userfiles/file/dezajokejim.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/a415df41b36385209498ad7f8c5c9413/55423377648.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/10d739ff38bf3cb9a02461db5a11000d/najusorutepe.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/q55d5e1csitdhmr3n3rhfesj94/17180947274.pdfIn PDF document text
    • http://vita24h.com/uploads/userfiles/file/39748215507.pdfIn PDF document text
    • http://babamoleskine.com/files/file/puwujowijigawirigav.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/03oevg7bmqi9c0c04fcl6s86k5/49573061102.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/fanaririzomutunoduva.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/sigedofudegapevukezexibeb.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/15826780572.pdfIn PDF document text
    • http://masonhn.com/d/files/49243123607.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/62061744702.pdfIn PDF document text
    • http://skidubravy.sk/spravca/ckfinder/userfiles/files/kivomupurivijix.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/b05bc59b6749f54850ce738569130f5b/71919531181.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/kefaporedek.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/72075383264.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/24f2c90cd65edb4c4405cd7cfe498684/fojab.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/uutb6mhj7cdnlhlii93hs0qd90/nukop.pdfIn PDF document text
    • http://teknis.it/userfiles/files/41778800083.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b6023c0bdfe---guliwik.pdfIn PDF document text
    • http://bishnutoursandtravels.in/userfiles/file/rodevub.pdfIn PDF document text
    • https://www.sesc-am.com.br/Selecao/ckfinder/files/duvezunokosijirekovatemix.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b9df02117---3747850514.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_off00010b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7D 18768 bytes
SHA-256: f446ac7fc0fb8c39f7f73b636861957b4c98376388654600b0ea6d0c1b1de8a7
font_01_sfnt_off00013bba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000153d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153D1 10912 bytes
SHA-256: 7e09e6ce0a6b102030ba12d02a5ecd4ae47539ec70ef50a55f2ed4b96a9190ca

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