Malicious PDF — malware analysis report

Static analysis result for SHA-256 09fe4b2239b6f54c…

MALICIOUS

PDF

79.3 KB Created: 2021-09-16 10:19:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5a6dc4cc04e7873f5b3bff882cd5a09d SHA-1: 3c200bd70fe64d1ef4ffa7f1fa7726622db63462 SHA-256: 09fe4b2239b6f54c22ce50aa4d7d1b517be825956e7117d4a22b8e847eb17e3c
196 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS uploads or disposable hosting. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the document's content is designed to trick users into believing there are new or changed banking instructions, a common tactic in business email compromise scams. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://emotionpicturesfestival.gr/userfiles/file/lifofibubajafov.pdf In PDF document text
    • https://pgprojekt.pl/Upload/file/99890258054.pdfIn PDF document text
    • http://awards.nl/img/cms/file/72656283758.pdfIn PDF document text
    • http://cokhiminhhien.com/media/ftp/file/9940823849.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///wegafagijewelejalebi.pdfIn PDF document text
    • http://sportservistocik.cz/UserFiles/File/57134772139.pdfIn PDF document text
    • http://bilafafafa.com/shopadmin/upload/files/rutelu.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161361d5799d28---31151686981.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/rknlf3btnj262t56qe3c81he8k/zasixamapamazororogizubiv.pdfIn PDF document text
    • http://www.mmd.ntou.edu.tw/ckfinder/userfiles/files/16424718660.pdfIn PDF document text
    • http://www.eatvirukai.lt/uploads/files/53188212570.pdfIn PDF document text
    • http://tchid.net/userfiles/file/55268008717.pdfIn PDF document text
    • http://rockefellersgold.hu/editor_up/84613182404.pdfIn PDF document text
    • http://xn----7sbezcba9a5aggb3j.xn--p1ai/ckfinder/userfiles/files/tufogutasanur.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134ebd1029c1---25330681633.pdfIn PDF document text
    • http://kmsenior.org/file/files/45994765231.pdfIn PDF document text
    • https://www.naabelectric.com/userfiles/files/68678546002.pdfIn PDF document text
    • https://avukatwebsitesi.kocgrafik.net/upload/files/luwazonofuratativazimofu.pdfIn PDF document text
    • https://pernambucoimortal.com/imagens/files/74942255631.pdfIn PDF document text
    • http://h-n-s.net/userfiles/file/96926878255.pdfIn PDF document text
    • https://network-italia.com/file/53434097069.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=move+contact+from+android+to+iphonePDF 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_off0000d281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD281 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA93 17256 bytes
SHA-256: f736ff84d7db3b857b7d7409d909cdc151eb207fd35caae1f60c02cc03718623
font_02_sfnt_off000116ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116EE 10728 bytes
SHA-256: 3a0f0b5445793031ae2bb8e64db7538d86a3af451c88565f469f428ab96ab6b6

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