Malicious PDF — malware analysis report

Static analysis result for SHA-256 9734c33645f1c045…

MALICIOUS

PDF

76.2 KB Created: 2021-09-22 15:09:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 7c6dee09e616200b48ff24f106834968 SHA-1: 8b534983b85229a4dbbca0960430a61cf7f8003e SHA-256: 9734c33645f1c0455ed1c06de8adc09fe0d738c01bb5652f0827bbbc7880940c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple domains, many of which appear to be disposable or compromised, suggesting a phishing or malware distribution attempt. The embedded URLs are designed to redirect users to download further malicious content, likely other PDFs or executables.

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 http://modernplating.com/userfiles/file/49326230934.pdf In PDF document text
    • http://rspon.pl/images/wyswig_images/file/fiwuzivumonafepete.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/xidokixe.pdfIn PDF document text
    • http://metall-press.ru/files/51014849575.pdfIn PDF document text
    • http://laserbeautymachine.net/d/files/sorugur.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131f3e2424a7---renelajapida.pdfIn PDF document text
    • http://nomorecpapmachine.com/userfiles/files/silomatej.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/mozupiladawiliwivazetava.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161409e0240897---94791570343.pdfIn PDF document text
    • http://winhazel.com/indigo/ckfinder/userfiles/files/tonugerewofixikokol.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161390a224084a---32435570983.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/87474087504.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/58977086979.pdfIn PDF document text
    • https://owop.challengersports.com/userfiles/files/75347162063.pdfIn PDF document text
    • https://kamwalibais.com/userfiles/file/loseluwafagimuduvipanom.pdfIn PDF document text
    • https://www.jakketoes.be/ckfinder/userfiles/files/kuwevuwusedisujeredufaz.pdfIn PDF document text
    • http://twfindia.in/userfiles/files/47148635704.pdfIn PDF document text
    • https://tsydesign.com/userfiles/jws/files/sogunenabuw.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/xusipekefiwuvowax.pdfIn PDF document text
    • https://dongphuchuytai.com/upload/files/dupizigitawe.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16142882f3a73a---98794663376.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/pesoxipejonuxiwexixa.pdfIn PDF document text
    • https://buildingexpertsdirectory.com/ckfinder/userfiles/files/80812386927.pdfIn PDF document text
    • https://buka.ru/sadm_files/maluxebu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+transfer+data+from+internal+storage+to+sd+card+in+redmiPDF 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_off0000c66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC66F 10896 bytes
SHA-256: 61a05289f62fa7127c6689ba0a590ced748c02919ce3a4d93d091eb9643bd3a2
font_01_sfnt_off0000df72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF784 16748 bytes
SHA-256: ee9f4f994fd3a842a0461ec7266b28948267a253e72ac4884cf22f256121ec8d

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