Malicious PDF — malware analysis report

Static analysis result for SHA-256 7065c977362cb659…

MALICIOUS

PDF

101.0 KB Created: 2021-08-18 12:43:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 18a5dffca34acf3a25f2dcf007f53f22 SHA-1: 8019cd5e63edfd30ad1b4cb8c338268df6dab837 SHA-256: 7065c977362cb6593835f04f3105bfc245c0131efc66bf3ad44e2ab6abd6aca5
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, indicating a high likelihood of malicious intent. The file contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites or disposable domains, suggesting an attempt to distribute further malicious content or phish users. The presence of external URIs and a link farm structure strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://strechybenesov.cz/content/vulumedak.pdf In PDF document text
    • http://aldo-ins.com/userfiles/file/vejexagid.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6a0db952f---98648257432.pdfIn PDF document text
    • http://busanpc1.com/upload/fckeditor/file/wadenuwaka.pdfIn PDF document text
    • https://pearproperties.in/userfiles/file/zupogemenud.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160d383747f8d4---xepamubu.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b364176f8be---32996486497.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ca515b36c---65074875161.pdfIn PDF document text
    • http://agro-vostok.ru/userfiles/file/tawelosemijoxunuva.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/b72d8706419e4226bbd735fe7125eab5/nemifewunedozisabepumojok.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b4a4eae1077---zujimidafigufavef.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20210605111025219.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/39834388135.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/20535762706.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d837a0e5e90---92897982083.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/30532047966.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/2887f583e2a2a6bbae6cbd3c105baa14/jogerupam.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/fovozekavukoninofuse.pdfIn PDF document text
    • https://bodymason.com/user_uploads/files/zewutifuleta.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/4a796ffe86349e29669c03add65d98a1/raramokirot.pdfIn PDF document text
    • http://imbirimbir.ru/files/wezowevofakukivoromiwiz.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/43059897076.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/88188336574.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef6b85d183---pinogegelukegu.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/rujizibifukepaxixivu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=transformers+age+of+extinction+full+movie+hindi+dubbed+download+480pPDF 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_off00012763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12763 11932 bytes
SHA-256: 25e3d632bdf4d382854c2e39b04a5177b84306ab77c7d59a3061789f83e56282
font_01_sfnt_off00014386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14386 15900 bytes
SHA-256: d5fcb0484f08f29190a63ec1f3087ad87df6c9a5ed5d24bb5a6b3b6abfa7eda3
font_02_sfnt_off00016c5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1