Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ba9d1f8e3075c8…

MALICIOUS

PDF

79.6 KB Created: 2021-09-16 20:49:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 706b06f33918c60b03992ca48bdbab65 SHA-1: 9a66b8bd25d867104303494d1b1efa0020bf5065 SHA-256: 07ba9d1f8e3075c8c56be2439392adf31e376520e65ad14bc2c949e1ddd0dbb4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to various websites, some of which are hosted on compromised CMS uploads, suggesting an attempt to distribute malicious content or phish users. The presence of a high ML score and ClamAV detection further supports its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://tvsporedi.si/vsebina/66633696046.pdf In PDF document text
    • https://chmelo.hu/sites/default/files/file/tosojomumetinek.pdfIn PDF document text
    • http://azizavacanze.com/userfiles/files/kukuzala.pdfIn PDF document text
    • http://jatechkj.pl/upload/fck/file/bewido.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/46531780557.pdfIn PDF document text
    • http://chothuethietbi.info/img/files/38389292992.pdfIn PDF document text
    • http://ttmm.co.jp/ckfinder/userfiles/files/34724953124.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16141dcbb9ceb9---dejudonuwatu.pdfIn PDF document text
    • https://adetexfoamgroup.centralcms.cloud/galeria/files/lozenukojizu.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/21105896621.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/vofinosovatuzadeguxek.pdfIn PDF document text
    • http://moretonassets.net/userfiles/42300932773.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/47439467471.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/72470481582.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/64113787695.pdfIn PDF document text
    • http://profstil.az/userfiles/file/82209281353.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/dagetovikawipagoje.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161385d985199b---nigowosasosafikixigune.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/4383425142.pdfIn PDF document text
    • http://weforyou.it/userfiles/files/28330447853.pdfIn PDF document text
    • https://grouptm2.com/contents/files/wurevorevezimorul.pdfIn PDF document text
    • http://montpellier-businessplan.eu/mbp/upload/images/images/upload/ckfinder/gezivigokapo.pdfIn PDF document text
    • http://ok-poland.com/userfiles/file/63095585671.pdfIn PDF document text
    • https://pastravariaizvoarelebratiei.ro/images/file/80439386026.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/a8abcaa969a067d440956b675f033a77/tewujul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=among+us+download+free+latest+versionPDF 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_off0000d38b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA2 10928 bytes
SHA-256: 1658505d7a65cc487bd3aa39da5e7c8ac56364f793d5a97821a4444a4fcbadc5
font_02_sfnt_off000104d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D4 16936 bytes
SHA-256: 1d023a9bc3ebc9d171b18c643cb1ce0d9c03e70560c56ff15567e111cb1afdc8

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