Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d47973f15609801…

MALICIOUS

PDF

83.8 KB Created: 2021-06-30 09:44:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 852d75c00a8107518a646730590a2e9f SHA-1: ee6f366b3190b1cbfd301f1caa1249b1f74307bf SHA-256: 4d47973f1560980176414e03bed8ee2828605de8f7b95aa2ee436541fbfaed77
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or malware distribution lure. The file's structure as a link farm suggests it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/29f3f86608c6d1dc6b925028c3160d39/fobejigovodarelub.pdf In PDF document text
    • https://rajatotogroup4.com/contents//files/68835490254.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/14674225283.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a35db105b21---vefijopazukojazabireli.pdfIn PDF document text
    • http://sgpeo.pl/users//file/temova.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/439e2ec7de156dc0ceb03e7db0998f39/54353126520.pdfIn PDF document text
    • http://superplasticizer.cn/d/files/99194236021.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/10058768031.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/kukusikozevuza.pdfIn PDF document text
    • http://learningkey.org/userfiles/vigefolaropolazuvefodegap.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/r4poi4lsk3eb3qv0fsg2t3t1e3/17981370507.pdfIn PDF document text
    • http://uamarkets.com/images/file/soxib.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f717e10a0c---bexodabazasodo.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac07cea384e---61403244089.pdfIn PDF document text
    • https://jetaime-shop.com/files/dixixatas.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/sopamekumerotevipurase.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/jjkb8o39pe858bcb149tbq4se0/wonulekogegegesifedadaj.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/23888b2bea58c76bd18446b419d66501/44667971464.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/2959349337.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/fa60b5381a302d0c5c9a021e1b6fe4f9/fegelonepiruwa.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a80f972d1---57016047019.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/31a99b38237a7ba350c9b65b870a088f/watunobubodizuroxu.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/96483006502.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=conversations+with+a+spiritPDF 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_off0000e169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE169 10484 bytes
SHA-256: 1cea87bd94244bef1d4c1be6e32cac8b121046430d1dc600de748055d5050345
font_01_sfnt_off0000f951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF951 18024 bytes
SHA-256: 3681aede0d0bc12cd109a2affd8598cc855cddb5d60c7bbf988c293ea792b65f
font_02_sfnt_off00012872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12872 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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