Malicious PDF — malware analysis report

Static analysis result for SHA-256 226be6e564b22a41…

MALICIOUS

PDF

72.6 KB Created: 2021-07-19 14:38:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ee5b213027f8684bfb772598888e65f6 SHA-1: 848e658472ed629c1451a1a68965f623ddd65ad8 SHA-256: 226be6e564b22a41c6312b6f8564b8f2ac557500322c57e4687fbac778eec8f6
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised CMS upload directories, suggesting a phishing or malware distribution campaign. The document body was unreadable, but the heuristic firings strongly indicate the purpose of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083a0cd7ed80---mefonubupemesetawef.pdf In PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088d34f5096a---pubiwapu.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/5belkj1l6cjknr3mmugkh7qrv7/zabavo.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/54e9599d3898a6f9a4dd5f4f45d9e803/80075299522.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608701e76234d---21206380999.pdfIn PDF document text
    • http://doorsatyrau.com/ckfinder/userfiles/files/vuwajulusepib.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/5f6c1865cb26a90a400c803d5033be47/kofam.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c31790ad714---pukadu.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d36f1abbed7---rabopudesifolixodekeponaz.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/92468255938.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/f489c926bba06ed8d9734d65f1edcb08/2056299016.pdfIn PDF document text
    • http://srlamn.com/clients/0/00/00e84243199fd86ca7c15d66a0237eb0/File/wevinodilivux.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/200dc7a3393368d77dd8fe5e9a9054f1/towelatonuxujed.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc5b1e8c8a---55555862144.pdfIn PDF document text
    • http://e-hematologica.com/users//file/75232312094.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160b88227aca1e---taparofikoruwinoni.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/35017e5e0aec02b88608f988a75ffd0c/dulafixu.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac050bcc12b---63796350850.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3fb2bc943---kadonigiruzegi.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6491c8690f---zowudiforonuf.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/zemavanipe.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/tawipok.pdfIn PDF document text
    • https://mmszke.hu/files/file/82872690963.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/sesalit.pdfIn PDF document text
    • http://minhvuongthuphap.com/upload/ck/files/68941858707.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=the+sun+to+my+moonPDF 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_off0000bd46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d55d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55D 10152 bytes
SHA-256: 642054e8c2399eae92c92b7386ca354f820dfe81c035de6ef38eb39a4e9cdbdb
font_02_sfnt_off0000ebf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF4 16052 bytes
SHA-256: 289c1946a004d0aa69d320e10bb79daaf2e344c0485fa89159d781523ffbb1d0

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