Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b7c32a7258958a…

MALICIOUS

PDF

78.9 KB Created: 2021-09-01 10:28:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 00b7d03d588b864a7e1684ee11eed243 SHA-1: 2346fcee499f246e00089368f648c3cf008dba4a SHA-256: 06b7c32a7258958ab5560e08afa163027a466f2f24ffdc03a00a5e71022a810d
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/dj53fn5sb4lg318gpn26g3ruu7/96240382749.pdf In PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089ef8b33a21---gupirusatavepa.pdfIn PDF document text
    • http://phonphangschool.com/upload/files/86239159287.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/77434855841.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/25247438543.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/97600015250.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16100a3da96894---fotixumuseweg.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dda75b19efe---luxasagunegelunupa.pdfIn PDF document text
    • https://showdetango.com/bafa/userfiles/file/wakisisekizobu.pdfIn PDF document text
    • https://pollackmihalyiskola.hu/ckfinder/userfiles/files/bibusovotupeveduwafevesed.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/80040803706.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612558d0d9b27---xizenakote.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/53393358920.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/1711004085.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3e88d6d855---vovazaloremewikegaliwileg.pdfIn PDF document text
    • http://parzenica-bialka.pl/userfiles/files/zonumawuboser.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c46a570cfb5---92538544503.pdfIn PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723549bfa2c---21290087362.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ac77397f1---pagetikovadonib.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/8tajcbn0ieunlmo2o96amjq3d0/96487666713.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/d678d033489e0172dda5c98844c1d7fb/55356067187.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=old+sorry+rulesPDF 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_off0000d4f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED03 16784 bytes
SHA-256: d06bd94bc4d96ceba6eb40cd727b3c51bd0fc393a31f759b28b5114fb97c962a
font_02_sfnt_off0001180e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1180E 10024 bytes
SHA-256: c20eaf41d2df091e8a38aec72c065aaffda2c6bb9ec25cb9c3b58fe4c1ed8dde

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