Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c7dd8795f18d1af…

MALICIOUS

PDF

75.2 KB Created: 2021-09-02 06:04:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d40ef685d718ed719b9d83f1c7b37a8a SHA-1: 97c3dee26081380352386b3fce43b2998b8fc424 SHA-256: 2c7dd8795f18d1af920f426b2bd3cb3ed0fe71baefeafc23f51430335ddf7041
156 Risk Score

Malware Insights

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

The PDF contains a link farm with multiple URLs pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cnn-logistics.com/asset/files/97963393445.pdf In PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/4uff4njkd8hpndnbbahkcttsn1/pigeniwase.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a28505ce76d---lemunajitomupam.pdfIn PDF document text
    • https://ocw.tw/uploads/files/82699972925.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/9066d2897e7caec52fe5094601f40bce/55787018223.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/jubuzilorivoredovudapof.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/vamcuam99sac0m6hm43q6fovd3/62736499136.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc396553e00---14010614795.pdfIn PDF document text
    • https://pasarantogel2.com/contents//files/161302412.pdfIn PDF document text
    • http://advicetao.eu/pictures/file/18054856170.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/860c7c90677664e6a8463e691db876ef/besuloxofevuzomuw.pdfIn PDF document text
    • http://charivne.info/images/file/56302144495.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/kubesurilodib.pdfIn PDF document text
    • http://peetersinstallatietechniek.nl/upload/files/6049377369.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/37803890237.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083816313954---90680825803.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/9dd7e1bd0b3d2ebc71c7ec1d5c5c885b/25487396996.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/33109041155.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/1cc5a19cfd7ec8f6defd1ebb8b5e7d65/94982252677.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/52803c44e78f3a0c2104c49e12850127/32560171434.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/juremenowoxufegudizoz.pdfIn PDF document text
    • http://beateromer.com/bilder/file/bibume.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc55e55e47---72241342993.pdfIn PDF document text
    • https://bandotrading.it/uploads/file/guxos.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/repiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=words+ending+with+zaPDF 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_off0000c246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC246 17200 bytes
SHA-256: 82fb407d5f2807599184581a8fa7832019d0eda57c4bd8409546eccce62a9d80
font_01_sfnt_off0000eea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA5 10620 bytes
SHA-256: 63232975ee5eaf17f9468557f5075de16fba3cc6d5bd6d81a0933e834efb3919
font_02_sfnt_off000106c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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