Malicious PDF — malware analysis report

Static analysis result for SHA-256 926fbd51af2567ef…

MALICIOUS

PDF

88.1 KB Created: 2021-06-26 00:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1be0c6ef95299812dd96343625181c6e SHA-1: 1fb2bf769ef2d18852d16af8a237403c81be33f3 SHA-256: 926fbd51af2567ef40958332c13279253fbecc45fe9a52894ea0b2e5644b5f3f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was detected by ClamAV as a phishing trojan and flagged by an ML classifier. It contains a link farm pointing to numerous domains, many of which are likely compromised or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://boucherienabli.com/uploads/FCK_files/file/98827404377.pdf
    • http://harchovyk.com/userfiles/file/febeteniniwizejivumo.pdf
    • http://drukarnia-skawina.pl/app/webroot/media/files/19390743713.pdf
    • https://theurbanthinktank.com/files/laraz.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/ecb8679209db911d3182fd0f6484f1ba/35413646847.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9a7c867668368752f7effe2717ccc5e2/77296268670.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160753a74b2b54---jawifesiziwiti.pdf
    • http://unipsyclinic.com/userfiles/file/20210612194749.pdf
    • https://ajitcoatings.com/uploads/7540772572.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/bb8e2a1be2505d6f2145b8c36bba4f5d/jokuvivexu.pdf
    • https://atamergranit.com/userfiles/file/94876938907.pdf
    • http://richmediahouse.com/admin/uploads/file/zivur.pdf
    • http://co-wemart.com/careeruserfiles/file/19900407747.pdf
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/ed5efb39ee9f5b447b8dbe03dea2bcc1/buwevodewa.pdf
    • http://shsclassof1959.com/clients/a/a7/a7a82b2a6025f7fafce5d77be70bf845/File/89345387138.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/00ur6hcjfdnvdcvq9sfhcdibac/petubefidu.pdf
    • http://porpora.biz/imagenes/imagenes_contenidos///soxadekusamalajeb.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/5646e73515ac5fdcb49e7cc0215114c0/76269569785.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/og5f429mfqjf3hbagdo1icceeo/wuzixotaj.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc15217fa54---89003317499.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/4c2c1ea847efae02550facb3fb1fadf3/31924132101.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/3e911f01b0e4345c293d0a8c8bd71f5f/rapina.pdf
    • http://strefa-fitness.pl//fckeditor/editor/filemanager/connectors/phpplikifile/tasawavujiwuzu.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1c6081a3e---55143864387.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/m351r4o96r3sgidmfd8m20d95t/lulale.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a011c4db12---43145173097.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=video+player+phone+tiny+watch+apk+free+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f59e.bin
dabb60f78008ea124749f70f0b4d75959d51e5c1f9d34f83c3c8095f4c6b2105
pdf-font-stream PDF embedded font (sfnt) at offset 0xF59E 10808 bytes
font_01_sfnt_off00010e85.bin
dd4bd0fd34b5f168c06400d5328caacb8acaa21bfa96ce90110c1e068cbdfeab
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E85 16992 bytes
font_02_sfnt_off00013aac.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13AAC 16792 bytes