Malicious PDF — malware analysis report

Static analysis result for SHA-256 075eb048f5066a44…

MALICIOUS

PDF

76.4 KB Created: 2021-09-06 16:24:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ca92cafe9b795eaf7219864cfc38a179 SHA-1: d60f692512f610e24a1af1a6c89ec3e9633b9e14 SHA-256: 075eb048f5066a441b92f104c9a56d61f0ffb8ba130fefa5eefa2276e9e44bc7
156 Risk Score

Malware Insights

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

The sample was identified 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 CMS platforms, suggesting a link farm or phishing lure. The presence of multiple PDF-specific heuristics related to URI and link farms further supports this attack pattern. No scripts were extracted, but the overall structure points to a document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/cq5graa6kjhirr42m3tj7lekd4/bakemudemepulubal.pdf In PDF document text
    • http://imhome-listings.com/userfiles/files/16287632494.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a435e8d9159---2415791745.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84d2628dfe---3901285369.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/fixodebobelezidurojot.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/599347cf16883ebfd01c90f6813b09b0/zididet.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/14986849606.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/f9ba2fe13976722a3824fd762a0ecb93/81038119280.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608763c45427e---xoporafafeb.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/95439da12ca3fecad47ecdcab88725b5/40267336589.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/38232237207.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cad59a5ee39---67598386922.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/10672980340.pdfIn PDF document text
    • http://xn--z92bzy85x.com/userData/board/file/dojabadazonagutor.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/56983776689.pdfIn PDF document text
    • http://fritz-fahrlaender.ch/download/mopujobix.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/79683186246.pdfIn PDF document text
    • http://phuvuongcorp.com/luutru/files/35090935656.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/zagazusido.pdfIn PDF document text
    • http://archissimo.eu/userfiles/files/dolipebufakim.pdfIn PDF document text
    • https://nicklason.se/ckfinder/userfiles/files/72118016443.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160f3739ff1da1---12207127860.pdfIn PDF document text
    • http://krr-nfe.com/suratnfe/UserFiles/File/2336745734.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/d8f69c60bd137958813b109d1deea2c1/meloleluzizutatujafigotos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=active+and+passive+immunity+difference+pdfPDF 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_off0000c8c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C9 16356 bytes
SHA-256: 3639d134b0a113b894e25b811695ac16af000fa9945a3f01905dabc56c354b5e
font_01_sfnt_off0000f2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D2 10876 bytes
SHA-256: 7837c68d1243a25983c9f97d62ae7514386119bf17b7dd6872d28ee87adefc36
font_02_sfnt_off00010c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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